{"Name":"MELAS syndrome","DiseaseID__c":"GARD:0007009","id":7009,"encodedName":"melas-syndrome","IsDeleted":false,"Disease_Name_Full__c":"MELAS syndrome","Xref_IDs__c":"39925003; C0162671; C84885; D017241; DOID:3687; E88.41; MEDGEN:56485; MONDO:0010789; NBK1233; OMIM:540000; ORPHA:550","USA_Estimate__c":"5,000","No_of_Specialist_Tagsa__c":10,"No_of_ClinGen_records__c":0,"No_of_GeneReviews__c":1,"No_of_HHS_records__c":1,"World_Estimate__c":"8,000 to 80,000","No_of_HRSA_records__c":0,"Evidence_Based_Score__c":3,"No_of_Disease_Descriptions__c":5,"Disease_Characteristics_Score__c":8,"No_of_Age_at_Onset__c":3,"Description_Source__c":"MONDO:0010789","Disease_Description__c":"A rare neurometabolic genetic disorder which is progressive and multisystemic due to mitochondrial dysfunction and that is characterized by encephalomyopathy, lactic acidosis, and stroke-like episodes.","GARD_Name__c":"MELAS syndrome","GARD_Synonym__c":"juvenile myopathy, encephalopathy, lactic acidosis, stroke; melas; melas - mitochondrial encephalopathy, lactic acidosis and stroke-like episodes; mitochondrial encephalomyopathy, lactic acidosis and stroke; mitochondrial encephalomyopathy, lactic acidosis and stroke-like episodes; mitochondrial encephalopathy, lactic acidosis, and stroke-like episodes; mitochondrial myopathy, encephalopathy, lactic acidosis and stroke-like episodes; mitochondrial myopathy, encephalopathy, lactic acidosis, and stroke-like episodes","Curated_Disease_Description_Source__c":"GARD:0007009","Curated_Disease_Description__c":"Mitochondrial encephalomyopathy, lactic acidosis, and stroke-like episodes (MELAS) is a condition that affects many of the body's systems, particularly the brain and nervous system (encephalo-) and muscles (myopathy). The signs and symptoms of this disorder most often appear in childhood following a period of normal development, although they can begin at any age. Early symptoms may include muscle weakness and pain, recurrent headaches, loss of appetite, vomiting, and seizures. Most affected individuals experience stroke-like episodes beginning before age 40. These episodes often involve temporary muscle weakness on one side of the body (hemiparesis), altered consciousness, vision abnormalities, seizures, and severe headaches resembling migraines. Repeated stroke-like episodes can progressively damage the brain, leading to vision loss, problems with movement, and a loss of intellectual function (dementia). Most people with MELAS have a buildup of lactic acid in their bodies, a condition called lactic acidosis. Increased acidity in the blood can lead to vomiting, abdominal pain, extreme tiredness (fatigue), muscle weakness, and difficulty breathing. Less commonly, people with MELAS may experience involuntary muscle spasms (myoclonus), impaired muscle coordination (ataxia), hearing loss, heart and kidney problems, diabetes, and hormonal imbalances.","Curated_USA_Estimate_Source__c":null,"Curated_USA_Estimate__c":"5,000","Age_at_Onset_Snippet_Text__c":"from Childhood to Adulthood","SourceID__c":"ORPHA:550","Deprecated__c":"No","Disease_Concept_Type__c":"Rare Disease Grouping","MONDO_ID__c":"MONDO:0010789","ORPHANET_ID__c":"ORPHA:550","Replaced_By_ID__c":null,"Display_Spanish_Disease_Name__c":"Melas","Spanish_Description_Source__c":"ORPHA:550","Spanish_Description__c":"Es un trastorno genético neurometabólico poco frecuente multisistético y progresivo debido a una disfunción mitocondrial y que está caracterizado por encefalomiopatía, acidosis láctica y episodios que simulan ictus.","Spanish_Disease_Name__c":"melas","Spanish_GARD_Synonym__c":"encefalomiopatía mitocondrial, acidosis láctica y episodios similares al ictus; encefalopatía mitocondrial, acidosis láctica y episodios similares al ictus; miopatía mitocondrial, encefalopatía, acidosis láctica y episodios similares al ictus","Category_Linearization__c":"ORPHA:98006","icd10_id__c":null,"mesh_id__c":null,"omim_id__c":null,"snomed_id__c":null,"umls_id__c":null,"GARD_Disease__c":[{"Curated_Disease_Description__c":"Mitochondrial encephalomyopathy, lactic acidosis, and stroke-like episodes (MELAS) is a condition that affects many of the body's systems, particularly the brain and nervous system (encephalo-) and muscles (myopathy). The signs and symptoms of this disorder most often appear in childhood following a period of normal development, although they can begin at any age. Early symptoms may include muscle weakness and pain, recurrent headaches, loss of appetite, vomiting, and seizures. Most affected individuals experience stroke-like episodes beginning before age 40. These episodes often involve temporary muscle weakness on one side of the body (hemiparesis), altered consciousness, vision abnormalities, seizures, and severe headaches resembling migraines. Repeated stroke-like episodes can progressively damage the brain, leading to vision loss, problems with movement, and a loss of intellectual function (dementia). Most people with MELAS have a buildup of lactic acid in their bodies, a condition called lactic acidosis. Increased acidity in the blood can lead to vomiting, abdominal pain, extreme tiredness (fatigue), muscle weakness, and difficulty breathing. Less commonly, people with MELAS may experience involuntary muscle spasms (myoclonus), impaired muscle coordination (ataxia), hearing loss, heart and kidney problems, diabetes, and hormonal imbalances.","Curated_Disease_Description_Source__c":"GARD:0007009","GARD_Synonym__c":"juvenile myopathy, encephalopathy, lactic acidosis, stroke; melas; melas - mitochondrial encephalopathy, lactic acidosis and stroke-like episodes; mitochondrial encephalomyopathy, lactic acidosis and stroke; mitochondrial encephalomyopathy, lactic acidosis and stroke-like episodes; mitochondrial encephalopathy, lactic acidosis, and stroke-like episodes; mitochondrial myopathy, encephalopathy, lactic acidosis and stroke-like episodes; mitochondrial myopathy, encephalopathy, lactic acidosis, and stroke-like episodes","Name":"MELAS syndrome","Curated_USA_Estimate__c":"5,000","estimateUsa":"5,000"}],"Organization_Supported_Diseases__c":[{"Account_Name__c":"Muscular Dystrophy Association","Website__c":"https://www.mda.org"},{"Account_Name__c":"Metabolic Support UK","Website__c":"https://www.metabolicsupportuk.org"},{"Account_Name__c":"Childhood Dementia Initiative","Website__c":"https://www.childhooddementia.org/"},{"Account_Name__c":"United Mitochondrial Disease Foundation","Website__c":"https://www.umdf.org"},{"Account_Name__c":"MitoAction","Website__c":"https://www.mitoaction.org/"},{"Account_Name__c":"Australian Mitochondrial Disease Foundation","Website__c":"https://www.amdf.org.au/"}],"GARD_Disease_Tag__c":[{"Tag_Name__c":"Genetics","Tag_Category__c":"Cause;Disease Category;Specialist","category_description":"Genetic diseases affect the DNA, or genetic instructions, which directs how tissues, organs, and body systems function.","curated_tag_name":"Genetic diseases"},{"Tag_Name__c":"Cardiology","Tag_Category__c":"Specialist"},{"Tag_Name__c":"Neurology","Tag_Category__c":"Disease Category;Specialist","category_description":"Neurological diseases affect the brain, spinal cord, cranial nerves, autonomic nerves, or other peripheral nerves.","curated_tag_name":"Neurological diseases"},{"Tag_Name__c":"Ophthalmology","Tag_Category__c":"Specialist"},{"Tag_Name__c":"Inborn Errors of Metabolism","Tag_Category__c":"Cause;Disease Category","category_description":"Inherited metabolic diseases, or inborn errors of metabolism, are a group of genetic diseases that affect the ability of the body's cells to convert food into energy.","curated_tag_name":"Inherited metabolic diseases"},{"Tag_Name__c":"Congenital Abnormality","Tag_Category__c":"Disease Category","category_description":"Birth defects are structural changes present at birth that can affect almost any part of the body, including how the body looks, works, or both.","curated_tag_name":"Birth defects"},{"Tag_Name__c":"Mitochondrial","Tag_Category__c":"Account;Cause;Disease Category","category_description":"Mitochondrial diseases are a group of genetic diseases that affect the ability of the body's cells to make energy.","curated_tag_name":"Mitochondrial diseases"},{"Tag_Name__c":"Otolaryngology","Tag_Category__c":"Specialist"},{"Tag_Name__c":"Peripheral Neuropathy","Tag_Category__c":"Account","curated_tag_name":"Peripheral neuropathy"},{"Tag_Name__c":"Epilepsy","Tag_Category__c":"Account;Specialist","curated_tag_name":"Epilepsy"},{"Tag_Name__c":"Cardiomyopathy","Tag_Category__c":"Account","curated_tag_name":"Cardiomyopathy"},{"Tag_Name__c":"Neuro-Ophthalmology","Tag_Category__c":"Specialist","curated_tag_name":"Neuro-ophthalmic diseases"},{"Tag_Name__c":"Neurodevelopmental disabilities","Tag_Category__c":"Specialist","curated_tag_name":"Neurodevelopmental disabilities"},{"Tag_Name__c":"Neuromuscular medicine","Tag_Category__c":"Specialist","curated_tag_name":"Neuromuscular medicine"},{"Tag_Name__c":"Pediatrics","Tag_Category__c":"Specialist"}],"Age_At_Onset__c":[{"Age_At_Onset__c":"Childhood","Provided_By__c":"ORPHA:550"},{"Age_At_Onset__c":"Adult","Provided_By__c":"ORPHA:550"},{"Age_At_Onset__c":"Adolescent","Provided_By__c":"ORPHA:550"}],"Diagnosis__c":[{"Type__c":"GTR","Curie__c":"MEDGEN:C0162671"}],"External_Identifier_Disease__c":[{"URL__c":"https://www.ncbi.nlm.nih.gov/books/NBK1233","Source__c":"Gene Review","Xref__c":"NBK1233"},{"URL__c":"https://www.ncbi.nlm.nih.gov/books/NBK1224","Xref__c":"NBK1224"},{"URL__c":"https://www.ebi.ac.uk/ols4/ontologies/doid/classes?obo_id=DOID%3A3687","Source__c":"MONDO:0010789","Xref__c":"DOID:3687"},{"URL__c":"https://www.ncbi.nlm.nih.gov/medgen/?term=56485","Source__c":"C0162671","Xref__c":"MEDGEN:56485"},{"URL__c":"https://uts.nlm.nih.gov/uts/umls/concept/C0162671","Source__c":"C0162671","Xref__c":"C0162671"},{"URL__c":"http://purl.bioontology.org/ontology/ICD10CM/E88.41","Source__c":"MONDO:0010789","Xref__c":"E88.41"},{"URL__c":"https://www.orpha.net/en/disease/detail/550","Source__c":"C0162671; MONDO:0010789; ORPHA:550","Xref__c":"ORPHA:550"},{"URL__c":"https://www.ncbi.nlm.nih.gov/mesh/C017241","Source__c":"C0162671; MONDO:0010789","Xref__c":"D017241"},{"URL__c":"https://www.omim.org/entry/540000","Source__c":"C0162671; MONDO:0010789; ORPHA:550","Xref__c":"OMIM:540000"},{"URL__c":"https://evsexplore.semantics.cancer.gov/evsexplore/concept/ncit/C84885","Source__c":"C0162671; MONDO:0010789","Xref__c":"C84885"},{"URL__c":"https://browser.ihtsdotools.org/?perspective=full&conceptId1=39925003","Source__c":"C0162671; MONDO:0010789","Xref__c":"39925003"},{"URL__c":"http://purl.obolibrary.org/obo/MONDO_0010789","Source__c":"GARD:0007009","Xref__c":"MONDO:0010789"},{"URL__c":"https://medlineplus.gov/genetics/condition/mitochondrial-encephalomyopathy-lactic-acidosis-and-stroke-like-episodes","Source__c":"GARD:0007009","Xref__c":"https://medlineplus.gov/genetics/condition/mitochondrial-encephalomyopathy-lactic-acidosis-and-stroke-like-episodes"}],"GARD_Disease_Gene__c":[{"GeneSymbol__c":"MT-TF","Gene_Type__c":"non-coding RNA","Causal_Gene__c":true},{"GeneSymbol__c":"MT-TC","Gene_Type__c":"non-coding RNA","Causal_Gene__c":true},{"GeneSymbol__c":"MT-TS2","Gene_Type__c":"non-coding RNA","Causal_Gene__c":true},{"GeneSymbol__c":"MT-TW","Gene_Type__c":"non-coding RNA","Causal_Gene__c":true},{"GeneSymbol__c":"MT-CO3","Gene_Type__c":"protein-coding gene","Causal_Gene__c":true},{"GeneSymbol__c":"MT-TS1","GHR_URL__c":"https://medlineplus.gov/genetics/gene/mt-ts1","Gene_Type__c":"non-coding RNA","Causal_Gene__c":true},{"GeneSymbol__c":"MT-ND6","GHR_URL__c":"https://medlineplus.gov/genetics/gene/mt-nd6","Gene_Type__c":"protein-coding gene","Causal_Gene__c":true},{"GeneSymbol__c":"MT-CO2","Gene_Type__c":"protein-coding gene","Causal_Gene__c":true},{"GeneSymbol__c":"MT-TK","GHR_URL__c":"https://medlineplus.gov/genetics/gene/mt-tk","Gene_Type__c":"non-coding RNA","Causal_Gene__c":true},{"GeneSymbol__c":"MT-ND1","GHR_URL__c":"https://medlineplus.gov/genetics/gene/mt-nd1","Gene_Type__c":"protein-coding gene","Causal_Gene__c":true},{"GeneSymbol__c":"MT-ND5","GHR_URL__c":"https://medlineplus.gov/genetics/gene/mt-nd5","Gene_Type__c":"protein-coding gene","Causal_Gene__c":true},{"GeneSymbol__c":"MT-TQ","Gene_Type__c":"non-coding RNA","Causal_Gene__c":true},{"GeneSymbol__c":"MT-TV","GHR_URL__c":"https://medlineplus.gov/genetics/gene/mt-tv","Gene_Type__c":"non-coding RNA","Causal_Gene__c":true},{"GeneSymbol__c":"MT-TL1","GHR_URL__c":"https://medlineplus.gov/genetics/gene/mt-tl1","Gene_Type__c":"non-coding RNA","Causal_Gene__c":true},{"GeneSymbol__c":"MT-CO1","Gene_Type__c":"protein-coding gene","Causal_Gene__c":true},{"GeneSymbol__c":"MT-CYB","GHR_URL__c":"https://medlineplus.gov/genetics/gene/mt-cyb","Gene_Type__c":"protein-coding gene","Causal_Gene__c":true},{"GeneSymbol__c":"MT-TL2","Gene_Type__c":"non-coding RNA","Causal_Gene__c":true},{"GeneSymbol__c":"MT-TH","GHR_URL__c":"https://medlineplus.gov/genetics/gene/mt-th","Gene_Type__c":"non-coding RNA","Causal_Gene__c":true}],"Inheritance__c":["Mitochondrial inheritance"],"GARD_Disease_Feature__c":[{"Provided_By__c":"ORPHA:550","HPO_Frequency__c":"Occasional (5-29%)","Feature__r":{"HPO_Description__c":"A disorder of the cardiac conduction system of the heart characterized by ventricular preexcitation due to the presence of an abnormal accessory atrioventricular electrical conduction pathway.","HPO_Feature_URL__c":"https://hpo.jax.org/browse/term/HP:0001716","HPO_Name__c":"Wolff-Parkinson-White syndrome","Feature_System__c":"Cardiovascular System","HPO_Feature_Type__c":"Symptom"}},{"Provided_By__c":"ORPHA:550","HPO_Frequency__c":"Occasional (5-29%)","Feature__r":{"HPO_Description__c":"Redness of the skin, caused by hyperemia of the capillaries in the lower layers of the skin.","HPO_Feature_URL__c":"https://hpo.jax.org/browse/term/HP:0010783","HPO_Synonym__c":"Redness of skin or mucous membrane","HPO_Name__c":"Erythema","Feature_System__c":"Skin System; Cardiovascular System","HPO_Feature_Type__c":"Symptom"}},{"Provided_By__c":"ORPHA:550","HPO_Frequency__c":"Very frequent (80-99%)","Feature__r":{"HPO_Description__c":"Reduced strength of muscles.","HPO_Feature_URL__c":"https://hpo.jax.org/browse/term/HP:0001324","HPO_Synonym__c":"Muscle weakness; Muscular weakness","HPO_Name__c":"Muscle weakness","Feature_System__c":"Musculoskeletal System","HPO_Feature_Type__c":"Symptom"}},{"Provided_By__c":"ORPHA:550","HPO_Frequency__c":"Occasional (5-29%)","Feature__r":{"HPO_Description__c":"Atrophy of the optic nerve. Optic atrophy results from the death of the retinal ganglion cell axons that comprise the optic nerve and manifesting as a pale optic nerve on fundoscopy.","HPO_Feature_URL__c":"https://hpo.jax.org/browse/term/HP:0000648","HPO_Synonym__c":"Optic nerve atrophy; Optic-nerve degeneration","HPO_Name__c":"Optic atrophy","HPO_Feature_Type__c":"Symptom"}},{"Provided_By__c":"ORPHA:550","HPO_Frequency__c":"Very frequent (80-99%)","Feature__r":{"HPO_Description__c":"An increase in size of the anatomic space between the arachnoid membrane and pia mater in the region surrounding the cerebrum.","HPO_Feature_URL__c":"https://hpo.jax.org/browse/term/HP:0012766","HPO_Name__c":"Widened cerebral subarachnoid space","Feature_System__c":"Nervous System","HPO_Feature_Type__c":"Symptom"}},{"Provided_By__c":"ORPHA:550","HPO_Frequency__c":"Occasional (5-29%)","Feature__r":{"HPO_Description__c":"A pattern of thinking and perceiving characterized by a loss of contact with reality, leading to significant changes in thoughts, perceptions, and behaviors.","HPO_Feature_URL__c":"https://hpo.jax.org/browse/term/HP:0001345","HPO_Name__c":"Psychotic mentation","Feature_System__c":"Nervous System","HPO_Feature_Type__c":"Symptom"}},{"Provided_By__c":"ORPHA:550","HPO_Frequency__c":"Occasional (5-29%)","Feature__r":{"HPO_Description__c":"A recurrent form of pancreatitis.","HPO_Feature_URL__c":"https://hpo.jax.org/browse/term/HP:0100027","HPO_Synonym__c":"Recurring pancreas inflammation; Recurring pancreatitis","HPO_Name__c":"Recurrent pancreatitis","Feature_System__c":"Immune System; Digestive System","HPO_Feature_Type__c":"Symptom"}},{"Provided_By__c":"ORPHA:550","HPO_Frequency__c":"Occasional (5-29%)","Feature__r":{"HPO_Description__c":"Hypertrichosis is increased hair growth that is abnormal in quantity or location.","HPO_Feature_URL__c":"https://hpo.jax.org/browse/term/HP:0000998","HPO_Name__c":"Hypertrichosis","Feature_System__c":"Skin System","HPO_Feature_Type__c":"Symptom"}},{"Provided_By__c":"ORPHA:550","HPO_Frequency__c":"Occasional (5-29%)","Feature__r":{"HPO_Description__c":"An abnormality of the retina characterized by pigment deposition. It is typically associated with migration and proliferation of macrophages or retinal pigment epithelial cells into the retina; melanin from these cells causes the pigmentary changes. Pigmentary retinopathy is a common final pathway of many retinal conditions and is often associated with visual loss.","HPO_Feature_URL__c":"https://hpo.jax.org/browse/term/HP:0000580","HPO_Synonym__c":"Pigmentary retinal deposits; Retinal pigment clumping; Retinal pigmentary clumping; Retinal pigmentary degeneration","HPO_Name__c":"Pigmentary retinopathy","HPO_Feature_Type__c":"Symptom"}},{"Provided_By__c":"ORPHA:550","HPO_Frequency__c":"Frequent (30-79%)","Feature__r":{"HPO_Description__c":"Peripheral neuropathy is a general term for any disorder of the peripheral nervous system. The main clinical features used to classify peripheral neuropathy are distribution, type (mainly demyelinating versus mainly axonal), duration, and course.","HPO_Feature_URL__c":"https://hpo.jax.org/browse/term/HP:0009830","HPO_Synonym__c":"Peripheral nerve damage; Peripheral neuritis","HPO_Name__c":"Peripheral neuropathy","Feature_System__c":"Nervous System","HPO_Feature_Type__c":"Symptom"}},{"Provided_By__c":"ORPHA:550","HPO_Frequency__c":"Occasional (5-29%)","Feature__r":{"HPO_Description__c":"Abnormally diminished level of attention, responsiveness, or wakefulness.","HPO_Feature_URL__c":"https://hpo.jax.org/browse/term/HP:0004372","HPO_Synonym__c":"Disturbances of consciousness; Lowered consciousness; Reduced consciousness/confusion","HPO_Name__c":"Reduced consciousness","Feature_System__c":"Nervous System","HPO_Feature_Type__c":"Symptom"}},{"Provided_By__c":"ORPHA:550","HPO_Frequency__c":"Occasional (5-29%)","Feature__r":{"HPO_Description__c":"A type of diabetes mellitus initially characterized by insulin resistance and hyperinsulinemia and subsequently by glucose interolerance and hyperglycemia.","HPO_Feature_URL__c":"https://hpo.jax.org/browse/term/HP:0005978","HPO_Synonym__c":"Diabetes mellitus Type II; Diabetes mellitus, noninsulin-dependent; NIDDM; NIDDM diabetes mellitus; Non-insulin dependent diabetes; Noninsulin dependent diabetes mellitus; Noninsulin-dependent diabetes; Type 2 diabetes; Type II diabetes","HPO_Name__c":"Type II diabetes mellitus","Feature_System__c":"Endocrine System","HPO_Feature_Type__c":"Symptom"}},{"Provided_By__c":"ORPHA:550","HPO_Frequency__c":"Occasional (5-29%)","Feature__r":{"HPO_Description__c":"Segmental accumulation of scar tissue in individual (but not all) glomeruli.","HPO_Feature_URL__c":"https://hpo.jax.org/browse/term/HP:0000097","HPO_Synonym__c":"Focal and segmental glomerular sclerosis; Focal and segmental glomerulosclerosis; focal glomerulosclerosis","HPO_Name__c":"Focal segmental glomerulosclerosis","HPO_Feature_Type__c":"Symptom"}},{"Provided_By__c":"ORPHA:550","HPO_Frequency__c":"Occasional (5-29%)","Feature__r":{"HPO_Description__c":"Bipolar disorder is an illness of mood characterized by alternating episodes of elevated and depressed moods, which are interspersed with euthymic periods.","HPO_Feature_URL__c":"https://hpo.jax.org/browse/term/HP:0007302","HPO_Synonym__c":"Bipolar depression; Bipolar disorder; Manic depressive","HPO_Name__c":"Bipolar affective disorder","Feature_System__c":"Nervous System","HPO_Feature_Type__c":"Symptom"}},{"Provided_By__c":"ORPHA:550","HPO_Frequency__c":"Occasional (5-29%)","Feature__r":{"HPO_Description__c":"Hypertrophic cardiomyopathy (HCM) is defined by the presence of increased ventricular wall thickness or mass in the absence of loading conditions (hypertension, valve disease) sufficient to cause the observed abnormality.","HPO_Feature_URL__c":"https://hpo.jax.org/browse/term/HP:0001639","HPO_Synonym__c":"Cardiomyopathy, hypertrophic; Enlarged and thickened heart muscle; HCM","HPO_Name__c":"Hypertrophic cardiomyopathy","Feature_System__c":"Cardiovascular System","HPO_Feature_Type__c":"Symptom"}},{"Provided_By__c":"ORPHA:550","HPO_Frequency__c":"Very frequent (80-99%)","Feature__r":{"HPO_Description__c":"An abnormal appearance of muscle fibers observed on muscle biopsy. Ragged red fibers can be visualized with Gomori trichrome staining as irregular and intensely red subsarcolemmal zones, whereas the normal myofibrils are green. The margins of affect fibers appear red and ragged. The ragged-red is due to the accumulation of abnormal mitochondria below the plasma membrane of the muscle fiber, leading to the appearance of a red rim and speckled sarcoplasm.","HPO_Feature_URL__c":"https://hpo.jax.org/browse/term/HP:0003200","HPO_Synonym__c":"Mitochondrial proliferation in muscle tissue; Ragged red muscle fibers; Ragged-red fibers","HPO_Name__c":"Ragged-red muscle fibers","Feature_System__c":"Musculoskeletal System","HPO_Feature_Type__c":"Symptom"}},{"Provided_By__c":"ORPHA:550","HPO_Frequency__c":"Frequent (30-79%)","Feature__r":{"HPO_Description__c":"An impairment of memory as manifested by a reduced ability to remember things such as dates and names, and increased forgetfulness.","HPO_Feature_URL__c":"https://hpo.jax.org/browse/term/HP:0002354","HPO_Synonym__c":"Amnesia; Forgetfulness; Memory impairment; Memory loss; Memory problems; Poor memory","HPO_Name__c":"Memory impairment","Feature_System__c":"Nervous System","HPO_Feature_Type__c":"Symptom"}},{"Provided_By__c":"ORPHA:550","HPO_Frequency__c":"Very frequent (80-99%)","Feature__r":{"HPO_Description__c":"An abnormality of the mitochondria in muscle tissue.","HPO_Feature_URL__c":"https://hpo.jax.org/browse/term/HP:0008316","HPO_Synonym__c":"Abnormal mitochondria in muscle","HPO_Name__c":"Abnormal mitochondria in muscle tissue","Feature_System__c":"Musculoskeletal System","HPO_Feature_Type__c":"Lab"}},{"Provided_By__c":"ORPHA:550","HPO_Frequency__c":"Frequent (30-79%)","Feature__r":{"HPO_Description__c":"A condition characterized by changes in personality and thought patterns, often accompanied by hallucinations and delusional beliefs, is known as psychosis.","HPO_Feature_URL__c":"https://hpo.jax.org/browse/term/HP:0000709","HPO_Synonym__c":"Psychosis","HPO_Name__c":"Psychosis","Feature_System__c":"Nervous System","HPO_Feature_Type__c":"Symptom"}},{"Provided_By__c":"ORPHA:550","HPO_Frequency__c":"Frequent (30-79%)","Feature__r":{"HPO_Description__c":"Forceful ejection of the contents of the stomach through the mouth by means of a series of involuntary spasmic contractions.","HPO_Feature_URL__c":"https://hpo.jax.org/browse/term/HP:0002013","HPO_Synonym__c":"Emesis; Throwing up; Vomiting","HPO_Name__c":"Vomiting","Feature_System__c":"Digestive System","HPO_Feature_Type__c":"Symptom"}},{"Provided_By__c":"ORPHA:550","HPO_Frequency__c":"Uncommon (<1-4%)","Feature__r":{"HPO_Description__c":"A condition caused by a deficiency of parathyroid hormone characterized by hypocalcemia and hyperphosphatemia.","HPO_Feature_URL__c":"https://hpo.jax.org/browse/term/HP:0000829","HPO_Synonym__c":"Decreased parathyroid hormone secretion; Low parathyroid hormone","HPO_Name__c":"Hypoparathyroidism","Feature_System__c":"Endocrine System","HPO_Feature_Type__c":"Symptom"}},{"Provided_By__c":"ORPHA:550","HPO_Frequency__c":"Frequent (30-79%)","Feature__r":{"HPO_Description__c":"The term gait disturbance can refer to any disruption of the ability to walk.","HPO_Feature_URL__c":"https://hpo.jax.org/browse/term/HP:0001288","HPO_Synonym__c":"Abnormal gait; Abnormal walk; Difficulty in walking; Gait abnormalities; Gait difficulties; Gait disturbances; Impaired gait; Walking disability","HPO_Name__c":"Gait disturbance","Feature_System__c":"Nervous System","HPO_Feature_Type__c":"Symptom"}},{"Provided_By__c":"ORPHA:550","HPO_Frequency__c":"Occasional (5-29%)","Feature__r":{"HPO_Description__c":"A functional rather than mechanical obstruction of the intestines, associated with manifestations that resemble those caused by an intestinal obstruction, including distension, abdominal pain, nausea, vomiting, constipation or diarrhea, in an individual in whom a mechanical blockage has been excluded.","HPO_Feature_URL__c":"https://hpo.jax.org/browse/term/HP:0004389","HPO_Synonym__c":"Intestinal pseudoobstruction","HPO_Name__c":"Intestinal pseudo-obstruction","Feature_System__c":"Digestive System","HPO_Feature_Type__c":"Symptom"}},{"Provided_By__c":"ORPHA:550","HPO_Frequency__c":"Frequent (30-79%)","Feature__r":{"HPO_Description__c":"Increased concentration of protein in the cerebrospinal fluid.","HPO_Feature_URL__c":"https://hpo.jax.org/browse/term/HP:0002922","HPO_Synonym__c":"Cerebrospinal fluid protein increased; Cerebrospinal fluid with increased protein; Elevated cerebrospinal fluid protein; Elevated csf protein; Hyperproteinorrhachia; Increased CSF protein; Increased protein in csf; Spinal fluid protein elevated","HPO_Name__c":"Increased CSF protein concentration","Feature_System__c":"Nervous System","HPO_Feature_Type__c":"Lab"}},{"Provided_By__c":"ORPHA:550","HPO_Frequency__c":"Frequent (30-79%)","Feature__r":{"HPO_Description__c":"Reduced ability affecting mainly visuospatial cognition which may be tested using pattern construction (for example by Differential Ability Scales, which test a person's strengths and weaknesses across a range of intellectual abilities).","HPO_Feature_URL__c":"https://hpo.jax.org/browse/term/HP:0010794","HPO_Name__c":"Impaired visuospatial constructive cognition","Feature_System__c":"Nervous System","HPO_Feature_Type__c":"Symptom"}},{"Provided_By__c":"ORPHA:550","HPO_Frequency__c":"Frequent (30-79%)","Feature__r":{"HPO_Description__c":"A bilateral tonic-clonic seizure is a seizure defined by a tonic (bilateral increased tone, lasting seconds to minutes) and then a clonic (bilateral sustained rhythmic jerking) phase.","HPO_Feature_URL__c":"https://hpo.jax.org/browse/term/HP:0002069","HPO_Synonym__c":"Bilateral convulsive seizures; Generalised tonic-clonic seizure (without specification of onset); Generalized convulsion; Generalized tonic-clonic seizure (without specification of onset); Grand mal; Grand mal seizures; Seizures, tonic-clonic; Tonic-clonic convulsion; Tonic-clonic convulsions","HPO_Name__c":"Bilateral tonic-clonic seizure","Feature_System__c":"Nervous System","HPO_Feature_Type__c":"Symptom"}},{"Provided_By__c":"ORPHA:550","HPO_Frequency__c":"Very frequent (80-99%)","Feature__r":{"HPO_Description__c":"Migraine is a chronic neurological disorder characterized by episodic attacks of headache and associated symptoms.","HPO_Feature_URL__c":"https://hpo.jax.org/browse/term/HP:0002076","HPO_Synonym__c":"Intermittent migraine headaches; Migraine; Migraine headache; Migraine headaches","HPO_Name__c":"Migraine","Feature_System__c":"Nervous System","HPO_Feature_Type__c":"Symptom"}},{"Provided_By__c":"ORPHA:550","HPO_Frequency__c":"Frequent (30-79%)","Feature__r":{"HPO_Description__c":"A focal-onset seizure is a type of seizure originating within networks limited to one hemisphere. They may be discretely localized or more widely distributed, and may originate in subcortical structures.","HPO_Feature_URL__c":"https://hpo.jax.org/browse/term/HP:0007359","HPO_Synonym__c":"Focal onset seizure; Focal seizure; Focal seizures; Focal-onset seizures; Partial seizure; Partial seizures; Seizure affecting one half of brain","HPO_Name__c":"Focal-onset seizure","Feature_System__c":"Nervous System","HPO_Feature_Type__c":"Symptom"}},{"Provided_By__c":"ORPHA:550","HPO_Frequency__c":"Frequent (30-79%)","Feature__r":{"HPO_Description__c":"Loss of visual acuity (implying that vision was better at a certain time point in life). Otherwise the term reduced visual acuity should be used (or a subclass of that).","HPO_Feature_URL__c":"https://hpo.jax.org/browse/term/HP:0000572","HPO_Synonym__c":"Loss of vision; Vision loss; Visual loss","HPO_Name__c":"Visual loss","HPO_Feature_Type__c":"Symptom"}},{"Provided_By__c":"ORPHA:550","HPO_Frequency__c":"Occasional (5-29%)","Feature__r":{"HPO_Description__c":"Abnormally increased frequency (usually defined as three or more) loose or watery bowel movements a day.","HPO_Feature_URL__c":"https://hpo.jax.org/browse/term/HP:0002014","HPO_Synonym__c":"Diarrhea; Watery stool","HPO_Name__c":"Diarrhea","Feature_System__c":"Digestive System","HPO_Feature_Type__c":"Symptom"}},{"Provided_By__c":"ORPHA:550","HPO_Frequency__c":"Occasional (5-29%)","Feature__r":{"HPO_Description__c":"A functional motor deficit where individuals whose responses to the challenges of exercise fail to achieve levels considered normal for their age and sex.","HPO_Feature_URL__c":"https://hpo.jax.org/browse/term/HP:0003546","HPO_Synonym__c":"Decreased ability to exercise; Inability to exercise; Low exercise endurance; Poor exercise tolerance","HPO_Name__c":"Exercise intolerance","HPO_Feature_Type__c":"Symptom"}},{"Provided_By__c":"ORPHA:550","HPO_Frequency__c":"Frequent (30-79%)","Feature__r":{"HPO_Description__c":"Loss of strength in the arm, leg, and sometimes face on one side of the body. Hemiplegia refers to a complete loss of strength, whereas hemiparesis refers to an incomplete loss of strength.","HPO_Feature_URL__c":"https://hpo.jax.org/browse/term/HP:0001269","HPO_Synonym__c":"Weakness of one side of body","HPO_Name__c":"Hemiparesis","Feature_System__c":"Nervous System","HPO_Feature_Type__c":"Symptom"}},{"Provided_By__c":"ORPHA:550","HPO_Frequency__c":"Frequent (30-79%)","Feature__r":{"HPO_Description__c":"Intense feelings of nervousness, tension, or panic often arise in response to interpersonal stresses. There is worry about the negative effects of past unpleasant experiences and future negative possibilities. Individuals may feel fearful, apprehensive, or threatened by uncertainty, and they may also have fears of falling apart or losing control.","HPO_Feature_URL__c":"https://hpo.jax.org/browse/term/HP:0000739","HPO_Synonym__c":"Anxiety; Anxiousness; Excessive, persistent worry and fear","HPO_Name__c":"Anxiety","Feature_System__c":"Nervous System","HPO_Feature_Type__c":"Symptom"}},{"Provided_By__c":"ORPHA:550","HPO_Frequency__c":"Uncommon (<1-4%)","Feature__r":{"HPO_Description__c":"Deficiency of thyroid hormone.","HPO_Feature_URL__c":"https://hpo.jax.org/browse/term/HP:0000821","HPO_Synonym__c":"Low T4; Underactive thyroid","HPO_Name__c":"Hypothyroidism","Feature_System__c":"Endocrine System","HPO_Feature_Type__c":"Symptom"}},{"Provided_By__c":"ORPHA:550","HPO_Frequency__c":"Very frequent (80-99%)","Feature__r":{"HPO_Description__c":"A seizure is an intermittent abnormality of nervous system physiology characterized by a transient occurrence of signs and/or symptoms due to abnormal excessive or synchronous neuronal activity in the brain.","HPO_Feature_URL__c":"https://hpo.jax.org/browse/term/HP:0001250","HPO_Synonym__c":"Epileptic seizure; Seizures","HPO_Name__c":"Seizure","Feature_System__c":"Nervous System","HPO_Feature_Type__c":"Symptom"}},{"Provided_By__c":"ORPHA:550","HPO_Frequency__c":"Occasional (5-29%)","Feature__r":{"HPO_Description__c":"Initial bilateral ptosis followed by limitation of eye movements in all directions and slowing of saccades.","HPO_Feature_URL__c":"https://hpo.jax.org/browse/term/HP:0000590","HPO_Synonym__c":"External ophthalmoplegia, progressive","HPO_Name__c":"Progressive external ophthalmoplegia","HPO_Feature_Type__c":"Symptom"}},{"Provided_By__c":"ORPHA:550","HPO_Frequency__c":"Frequent (30-79%)","Feature__r":{"HPO_Description__c":"A disorder of muscle unrelated to impairment of innervation or neuromuscular junction.","HPO_Feature_URL__c":"https://hpo.jax.org/browse/term/HP:0003198","HPO_Synonym__c":"Muscle tissue disease; Myopathic changes","HPO_Name__c":"Myopathy","Feature_System__c":"Musculoskeletal System","HPO_Feature_Type__c":"Symptom"}},{"Provided_By__c":"ORPHA:550","HPO_Frequency__c":"Occasional (5-29%)","Feature__r":{"HPO_Description__c":"A delay in the achievement of motor or mental milestones in the domains of development of a child, including motor skills, speech and language, cognitive skills, and social and emotional skills. This term should only be used to describe children younger than five years of age.","HPO_Feature_URL__c":"https://hpo.jax.org/browse/term/HP:0001263","HPO_Synonym__c":"Delayed cognitive development; Delayed development; Delayed developmental milestones; Delayed intellectual development; Delayed milestones; Delayed psychomotor development; Developmental delay; Developmental delay in early childhood; Developmental delay, global; Developmental retardation; GDD; Lack of psychomotor development; Motor and developmental delay; Motormental retardation; Psychomotor delay; Psychomotor development deficiency; Psychomotor development failure; Psychomotor developmental delay; Retarded development; Retarded mental development; Retarded psychomotor development","HPO_Name__c":"Global developmental delay","Feature_System__c":"Nervous System","HPO_Feature_Type__c":"Symptom"}},{"Provided_By__c":"ORPHA:550","HPO_Frequency__c":"Occasional (5-29%)","Feature__r":{"HPO_Feature_URL__c":"https://hpo.jax.org/browse/term/HP:0007141","HPO_Synonym__c":"Mixed polyneuropathy; Nerve damage causing decreased feeling and movement; Sensorimotor peripheral neuropathy","HPO_Name__c":"Sensorimotor neuropathy","Feature_System__c":"Nervous System","HPO_Feature_Type__c":"Symptom"}},{"Provided_By__c":"ORPHA:550","HPO_Frequency__c":"Occasional (5-29%)","Feature__r":{"HPO_Description__c":"Any anomaly of the progression of electrical impulses through the heart.","HPO_Feature_URL__c":"https://hpo.jax.org/browse/term/HP:0031546","HPO_Synonym__c":"Abnormality of cardiac conduction; Abnormality of cardiac conduction system; Cardiac conduction abnormalities; Cardiac conduction defects; Heart conduction disorder","HPO_Name__c":"Cardiac conduction abnormality","Feature_System__c":"Cardiovascular System","HPO_Feature_Type__c":"Symptom"}},{"Provided_By__c":"ORPHA:550","HPO_Frequency__c":"Very frequent (80-99%)","Feature__r":{"HPO_Description__c":"Abnormally increased level of blood lactate (2-hydroxypropanoic acid). Lactate is produced from pyruvate by lactate dehydrogenase during normal metabolism. The terms lactate and lactic acid are often used interchangeably but lactate (the component measured in blood) is strictly a weak base whereas lactic acid is the corresponding acid. Lactic acidosis is often used clinically to describe elevated lactate but should be reserved for cases where there is a corresponding acidosis (pH below 7.35).","HPO_Feature_URL__c":"https://hpo.jax.org/browse/term/HP:0002151","HPO_Synonym__c":"Increased blood lactate; Increased serum lactate","HPO_Name__c":"Increased circulating lactate concentration","HPO_Feature_Type__c":"Lab"}},{"Provided_By__c":"ORPHA:550","HPO_Frequency__c":"Very frequent (80-99%)","Feature__r":{"HPO_Description__c":"No consensus exists on what a stroke-like episode is, but these episodes can be functionally defined as a new neurological deficit, occurring with or without the context of seizures, which last longer than 24 hours.","HPO_Feature_URL__c":"https://hpo.jax.org/browse/term/HP:0002401","HPO_Synonym__c":"Stroke-like episodes; Strokelike episodes","HPO_Name__c":"Stroke-like episode","Feature_System__c":"Nervous System; Cardiovascular System","HPO_Feature_Type__c":"Symptom"}},{"Provided_By__c":"ORPHA:550","HPO_Frequency__c":"Frequent (30-79%)","Feature__r":{"HPO_Description__c":"Ataxia refers to impaired coordination of voluntary muscle movement. Cerebellar ataxia refers to ataxia due to dysfunction of the cerebellum. This causes a variety of elementary neurological deficits including asynergy (lack of coordination between muscles, limbs and joints), dysmetria (lack of ability to judge distances that can lead to under- or overshoot in grasping movements), and dysdiadochokinesia (inability to perform rapid movements requiring antagonizing muscle groups to be switched on and off repeatedly).","HPO_Feature_URL__c":"https://hpo.jax.org/browse/term/HP:0001251","HPO_Synonym__c":"Cerebellar ataxia","HPO_Name__c":"Ataxia","Feature_System__c":"Nervous System","HPO_Feature_Type__c":"Symptom"}},{"Provided_By__c":"ORPHA:550","HPO_Frequency__c":"Occasional (5-29%)","Feature__r":{"HPO_Description__c":"Failure to thrive (FTT) refers to a child whose physical growth is substantially below the norm.","HPO_Feature_URL__c":"https://hpo.jax.org/browse/term/HP:0001508","HPO_Synonym__c":"Faltering weight; FTT; Postnatal failure to thrive; Weight faltering","HPO_Name__c":"Failure to thrive","HPO_Feature_Type__c":"Symptom"}},{"Provided_By__c":"ORPHA:550","HPO_Frequency__c":"Occasional (5-29%)","Feature__r":{"HPO_Description__c":"An abnormality characterized by disruption of the normal functioning of peripheral axons.","HPO_Feature_URL__c":"https://hpo.jax.org/browse/term/HP:0003477","HPO_Synonym__c":"Axonal neuropathy; Axonal peripheral neuropathy","HPO_Name__c":"Peripheral axonal neuropathy","Feature_System__c":"Nervous System","HPO_Feature_Type__c":"Symptom"}},{"Provided_By__c":"ORPHA:550","HPO_Frequency__c":"Occasional (5-29%)","Feature__r":{"HPO_Feature_URL__c":"https://hpo.jax.org/browse/term/HP:0001045","HPO_Synonym__c":"Blotchy loss of skin color","HPO_Name__c":"Vitiligo","Feature_System__c":"Skin System","HPO_Feature_Type__c":"Symptom"}},{"Provided_By__c":"ORPHA:550","HPO_Frequency__c":"Uncommon (<1-4%)","Feature__r":{"HPO_Description__c":"Hypogonadotropic hypogonadism is characterized by reduced function of the gonads (testes in males or ovaries in females) and results from the absence of the gonadal stimulating pituitary hormones: follicle stimulating hormone (FSH) and luteinizing hormone (LH).","HPO_Feature_URL__c":"https://hpo.jax.org/browse/term/HP:0000044","HPO_Synonym__c":"Hypogonadotrophic hypogonadism; Low gonadotropins (secondary hypogonadism)","HPO_Name__c":"Hypogonadotropic hypogonadism","Feature_System__c":"Endocrine System","HPO_Feature_Type__c":"Symptom"}},{"Provided_By__c":"ORPHA:550","HPO_Frequency__c":"Frequent (30-79%)","Feature__r":{"HPO_Description__c":"Reduced attention span characterized by distractibility and impulsivity.","HPO_Feature_URL__c":"https://hpo.jax.org/browse/term/HP:0000736","HPO_Synonym__c":"Easily distracted; Easy distractibility; High distractibility; Poor attention span; Problem paying attention; Short attention span","HPO_Name__c":"Short attention span","Feature_System__c":"Nervous System","HPO_Feature_Type__c":"Symptom"}},{"Provided_By__c":"ORPHA:550","HPO_Frequency__c":"Frequent (30-79%)","Feature__r":{"HPO_Description__c":"Very brief, involuntary random muscular contractions occurring at rest, in response to sensory stimuli, or accompanying voluntary movements.","HPO_Feature_URL__c":"https://hpo.jax.org/browse/term/HP:0001336","HPO_Synonym__c":"Myoclonic jerks","HPO_Name__c":"Myoclonus","Feature_System__c":"Nervous System","HPO_Feature_Type__c":"Symptom"}},{"Provided_By__c":"ORPHA:550","HPO_Frequency__c":"Occasional (5-29%)","Feature__r":{"HPO_Description__c":"A type of Developmental delay characterized by a delay in acquiring motor skills.","HPO_Feature_URL__c":"https://hpo.jax.org/browse/term/HP:0001270","HPO_Synonym__c":"Delay in development of motor milestones; Delay in motor development; Delayed development of motor milestones; Delayed early motor milestones; Delayed motor development; Delayed motor milestones; Locomotor delay; Motor developmental delay; Motor developmental milestones not achieved; Motor retardation; Retarded motor development; Slow development of motor milestones","HPO_Name__c":"Motor delay","Feature_System__c":"Nervous System","HPO_Feature_Type__c":"Symptom"}},{"Provided_By__c":"ORPHA:550","HPO_Frequency__c":"Occasional (5-29%)","Feature__r":{"HPO_Description__c":"Peripheral sensory neuropathy affecting primarily distal sensation.","HPO_Feature_URL__c":"https://hpo.jax.org/browse/term/HP:0007067","HPO_Synonym__c":"Peripheral sensory neuropathy, distal","HPO_Name__c":"Distal peripheral sensory neuropathy","Feature_System__c":"Nervous System","HPO_Feature_Type__c":"Symptom"}},{"Provided_By__c":"ORPHA:550","HPO_Frequency__c":"Frequent (30-79%)","Feature__r":{"HPO_Description__c":"A group of abnormalities characterized by hyperglycemia and glucose intolerance.","HPO_Feature_URL__c":"https://hpo.jax.org/browse/term/HP:0000819","HPO_Name__c":"Diabetes mellitus","Feature_System__c":"Endocrine System","HPO_Feature_Type__c":"Symptom"}},{"Provided_By__c":"ORPHA:550","HPO_Frequency__c":"Occasional (5-29%)","Feature__r":{"HPO_Description__c":"Partial or complete wasting (loss) of brain tissue that was once present.","HPO_Feature_URL__c":"https://hpo.jax.org/browse/term/HP:0012444","HPO_Synonym__c":"Brain degeneration; Brain wasting","HPO_Name__c":"Brain atrophy","Feature_System__c":"Nervous System","HPO_Feature_Type__c":"Symptom"}},{"Provided_By__c":"ORPHA:550","HPO_Frequency__c":"Frequent (30-79%)","Feature__r":{"HPO_Description__c":"Changes in one's level of awareness and responsiveness to their environment.","HPO_Feature_URL__c":"https://hpo.jax.org/browse/term/HP:0007159","HPO_Name__c":"Fluctuations in consciousness","Feature_System__c":"Nervous System","HPO_Feature_Type__c":"Symptom"}},{"Provided_By__c":"ORPHA:550","HPO_Frequency__c":"Occasional (5-29%)","Feature__r":{"HPO_Description__c":"Dysfunction of the proximal tubule, which is the portion of the duct system of the nephron of the kidney which leads from Bowman's capsule to the loop of Henle.","HPO_Feature_URL__c":"https://hpo.jax.org/browse/term/HP:0000114","HPO_Synonym__c":"Proximal renal tubule defect; Proximal renal tubulopathy; Proximal tubular defect; Proximal tubule dysfunction; Selective proximal tubular damage","HPO_Name__c":"Proximal tubulopathy","HPO_Feature_Type__c":"Symptom"}},{"Provided_By__c":"ORPHA:550","HPO_Frequency__c":"Very frequent (80-99%)","Feature__r":{"HPO_Description__c":"Absence or underdevelopment of the cerebral white matter.","HPO_Feature_URL__c":"https://hpo.jax.org/browse/term/HP:0012429","HPO_Synonym__c":"Absent/small cerebral white matter; Absent/underdeveloped cerebral white matter","HPO_Name__c":"Aplasia/Hypoplasia of the cerebral white matter","Feature_System__c":"Nervous System","HPO_Feature_Type__c":"Symptom"}},{"Provided_By__c":"ORPHA:550","HPO_Frequency__c":"Occasional (5-29%)","Feature__r":{"HPO_Description__c":"An increase in the level of lactate in the brain identified by magnetic resonance spectroscopy (MRS).","HPO_Feature_URL__c":"https://hpo.jax.org/browse/term/HP:0012707","HPO_Name__c":"Elevated brain lactate level by MRS","Feature_System__c":"Nervous System","HPO_Feature_Type__c":"Imaging_MRI"}},{"Provided_By__c":"ORPHA:550","HPO_Frequency__c":"Occasional (5-29%)","Feature__r":{"HPO_Feature_URL__c":"https://hpo.jax.org/browse/term/HP:0007327","HPO_Name__c":"Mixed demyelinating and axonal polyneuropathy","Feature_System__c":"Nervous System","HPO_Feature_Type__c":"Symptom"}},{"Provided_By__c":"ORPHA:550","HPO_Frequency__c":"Frequent (30-79%)","Feature__r":{"HPO_Description__c":"Repeated episodes of headache with rapid onset, reaching a peak within minutes and of short duration (less than one hour) with pain that is throbbing, pulsating, or bursting in quality.","HPO_Feature_URL__c":"https://hpo.jax.org/browse/term/HP:0002331","HPO_Name__c":"Recurrent paroxysmal headache","Feature_System__c":"Nervous System","HPO_Feature_Type__c":"Symptom"}},{"Provided_By__c":"ORPHA:550","HPO_Frequency__c":"Occasional (5-29%)","Feature__r":{"HPO_Description__c":"Abnormal intestinal contractions, such as spasms and intestinal paralysis, related to the loss of the ability of the gut to coordinate muscular activity because of endogenous or exogenous causes.","HPO_Feature_URL__c":"https://hpo.jax.org/browse/term/HP:0002579","HPO_Synonym__c":"GI dysmotility","HPO_Name__c":"Gastrointestinal dysmotility","Feature_System__c":"Digestive System","HPO_Feature_Type__c":"Symptom"}},{"Provided_By__c":"ORPHA:550","HPO_Frequency__c":"Occasional (5-29%)","Feature__r":{"HPO_Description__c":"Dilated cardiomyopathy (DCM) is defined by the presence of left ventricular dilatation and left ventricular systolic dysfunction in the absence of abnormal loading conditions (hypertension, valve disease) or coronary artery disease sufficient to cause global systolic impairment. Right ventricular dilation and dysfunction may be present but are not necessary for the diagnosis.","HPO_Feature_URL__c":"https://hpo.jax.org/browse/term/HP:0001644","HPO_Synonym__c":"Cardiomyopathy, dilated; Congestive cardiomyopathy; DCM; Stretched and thinned heart muscle","HPO_Name__c":"Dilated cardiomyopathy","Feature_System__c":"Cardiovascular System","HPO_Feature_Type__c":"Symptom"}},{"Provided_By__c":"ORPHA:550","HPO_Frequency__c":"Very frequent (80-99%)","Feature__r":{"HPO_Description__c":"An abnormal buildup of lactic acid in the body, leading to acidification of the blood and other bodily fluids.","HPO_Feature_URL__c":"https://hpo.jax.org/browse/term/HP:0003128","HPO_Synonym__c":"Hyperlacticacidemia; Increased lactate in body; Lactic acidemia; Lacticacidemia; Lacticacidosis","HPO_Name__c":"Lactic acidosis","HPO_Feature_Type__c":"Lab"}},{"Provided_By__c":"ORPHA:550","HPO_Frequency__c":"Occasional (5-29%)","Feature__r":{"HPO_Description__c":"A myocardial disorder in which the heart muscle is structurally and functionally abnormal, in the absence of coronary artery disease, hypertension, valvular disease and congenital heart disease sufficient to cause the observed myocardial abnormality.","HPO_Feature_URL__c":"https://hpo.jax.org/browse/term/HP:0001638","HPO_Synonym__c":"Disease of the heart muscle","HPO_Name__c":"Cardiomyopathy","Feature_System__c":"Cardiovascular System","HPO_Feature_Type__c":"Symptom"}},{"Provided_By__c":"ORPHA:550","HPO_Frequency__c":"Frequent (30-79%)","Feature__r":{"HPO_Description__c":"Increased concentration of lactate in the cerebrospinal fluid.","HPO_Feature_URL__c":"https://hpo.jax.org/browse/term/HP:0002490","HPO_Synonym__c":"Hyperlactatorachia; Increased cerebrospinal fluid lactate; Increased CSF lactic acid","HPO_Name__c":"Increased CSF lactate","Feature_System__c":"Nervous System","HPO_Feature_Type__c":"Lab"}},{"Provided_By__c":"ORPHA:550","HPO_Frequency__c":"Occasional (5-29%)","Feature__r":{"HPO_Description__c":"An abnormal shift in patterns of thinking, acting, or feeling.","HPO_Feature_URL__c":"https://hpo.jax.org/browse/term/HP:0000751","HPO_Synonym__c":"Personality change; Personality changes","HPO_Name__c":"Personality changes","Feature_System__c":"Nervous System","HPO_Feature_Type__c":"Symptom"}},{"Provided_By__c":"ORPHA:550","HPO_Frequency__c":"Occasional (5-29%)","Feature__r":{"HPO_Description__c":"An anomaly of the control or production of movement in the central nervous system.","HPO_Feature_URL__c":"https://hpo.jax.org/browse/term/HP:0011442","HPO_Synonym__c":"Abnormality of central motor function","HPO_Name__c":"Abnormal central motor function","Feature_System__c":"Nervous System","HPO_Feature_Type__c":"Symptom"}},{"Provided_By__c":"ORPHA:550","HPO_Frequency__c":"Frequent (30-79%)","Feature__r":{"HPO_Description__c":"A height below that which is expected according to age and sex norms. Although there is no universally accepted definition of short stature, many refer to \\\"short stature\\\" as height more than 2 standard deviations below the mean for age and sex (or below the 3rd percentile for age and sex dependent norms).","HPO_Feature_URL__c":"https://hpo.jax.org/browse/term/HP:0004322","HPO_Synonym__c":"Decreased body height; Height less than 3rd percentile; Short stature; Small stature; Stature below 3rd percentile","HPO_Name__c":"Short stature","HPO_Feature_Type__c":"Symptom"}},{"Provided_By__c":"ORPHA:550","HPO_Frequency__c":"Occasional (5-29%)","Feature__r":{"HPO_Description__c":"Hypertrophic cardiomyopathy with an symmetrical and concentric pattern of hypertrophy.","HPO_Feature_URL__c":"https://hpo.jax.org/browse/term/HP:0005157","HPO_Synonym__c":"Symmetric, concentric, hypertrophic cardiomyopathy","HPO_Name__c":"Concentric hypertrophic cardiomyopathy","Feature_System__c":"Cardiovascular System","HPO_Feature_Type__c":"Symptom"}},{"Provided_By__c":"ORPHA:550","HPO_Frequency__c":"Frequent (30-79%)","Feature__r":{"HPO_Description__c":"Frequently experiencing feelings of being down, miserable, and/or hopeless; struggling to recover from these moods; having a pessimistic outlook on the future; feeling a pervasive sense of shame; having a low self-worth; experiencing thoughts of suicide and engaging in suicidal behavior.","HPO_Feature_URL__c":"https://hpo.jax.org/browse/term/HP:0000716","HPO_Synonym__c":"Depression; Depressive episode; Depressivity","HPO_Name__c":"Depression","Feature_System__c":"Nervous System","HPO_Feature_Type__c":"Symptom"}},{"Provided_By__c":"ORPHA:550","HPO_Frequency__c":"Occasional (5-29%)","Feature__r":{"HPO_Description__c":"Underdevelopment of the corpus callosum.","HPO_Feature_URL__c":"https://hpo.jax.org/browse/term/HP:0002079","HPO_Synonym__c":"Corpus callosum hypoplasia; Hypoplasia of corpus callosum; Hypoplastic corpus callosum; Underdevelopment of part of brain called corpus callosum","HPO_Name__c":"Hypoplasia of the corpus callosum","Feature_System__c":"Nervous System","HPO_Feature_Type__c":"Symptom"}},{"Provided_By__c":"ORPHA:550","HPO_Frequency__c":"Occasional (5-29%)","Feature__r":{"HPO_Description__c":"Pulmonary hypertension is defined mean pulmonary artery pressure of 25mmHg or more and pulmonary capillary wedge pressure of 15mmHg or less when measured by right heart catheterisation at rest and in a supine position.","HPO_Feature_URL__c":"https://hpo.jax.org/browse/term/HP:0002092","HPO_Synonym__c":"Increased blood pressure in blood vessels of lungs; Pulmonary artery hypertension","HPO_Name__c":"Pulmonary arterial hypertension","Feature_System__c":"Cardiovascular System; Respiratory system","HPO_Feature_Type__c":"Symptom"}},{"Provided_By__c":"ORPHA:550","HPO_Frequency__c":"Occasional (5-29%)","Feature__r":{"HPO_Description__c":"Disruptions in the production of speech sounds, with involuntary repetitions of words or parts of words, prolongations of speech sounds, or complete blockage of speech production for several seconds.","HPO_Feature_URL__c":"https://hpo.jax.org/browse/term/HP:0025268","HPO_Synonym__c":"Stammering; Stuttering","HPO_Name__c":"Stuttering","Feature_System__c":"Nervous System","HPO_Feature_Type__c":"Symptom"}},{"Provided_By__c":"ORPHA:550","HPO_Frequency__c":"Very frequent (80-99%)","Feature__r":{"HPO_Description__c":"Abnormality observed by electroencephalogram (EEG), which is used to record of the brain's spontaneous electrical activity from multiple electrodes placed on the scalp.","HPO_Feature_URL__c":"https://hpo.jax.org/browse/term/HP:0002353","HPO_Synonym__c":"Abnormal EEG; Abnormal electroencephalogram; EEG abnormalities; Electroencephalogram abnormal; Electroencephalogram abnormalities","HPO_Name__c":"EEG abnormality","Feature_System__c":"Nervous System","HPO_Feature_Type__c":"Procedure_EEG"}},{"Provided_By__c":"ORPHA:550","HPO_Frequency__c":"Frequent (30-79%)","Feature__r":{"HPO_Description__c":"Impairment of certain skills such as reading or writing, coordination, self-control, or attention that interfere with the ability to learn. The impairment is not related to a global deficiency of intelligence.","HPO_Feature_URL__c":"https://hpo.jax.org/browse/term/HP:0001328","HPO_Name__c":"Specific learning disability","Feature_System__c":"Nervous System","HPO_Feature_Type__c":"Symptom"}},{"Provided_By__c":"ORPHA:550","HPO_Frequency__c":"Occasional (5-29%)","Feature__r":{"HPO_Description__c":"Infrequent or difficult evacuation of feces.","HPO_Feature_URL__c":"https://hpo.jax.org/browse/term/HP:0002019","HPO_Synonym__c":"Constipation; Costiveness; Dyschezia","HPO_Name__c":"Constipation","Feature_System__c":"Digestive System","HPO_Feature_Type__c":"Symptom"}},{"Provided_By__c":"ORPHA:550","HPO_Frequency__c":"Occasional (5-29%)","Feature__r":{"HPO_Description__c":"A nonspecific term referring to disease or damage of the kidneys.","HPO_Feature_URL__c":"https://hpo.jax.org/browse/term/HP:0000112","HPO_Name__c":"Nephropathy","HPO_Feature_Type__c":"Symptom"}},{"Provided_By__c":"ORPHA:550","HPO_Frequency__c":"Occasional (5-29%)","Feature__r":{"HPO_Description__c":"A reduction in erythrocytes volume or hemoglobin concentration.","HPO_Feature_URL__c":"https://hpo.jax.org/browse/term/HP:0001903","HPO_Synonym__c":"Anaemia; Low number of red blood cells or hemoglobin","HPO_Name__c":"Anemia","Feature_System__c":"Blood and Blood-Forming Tissue","HPO_Feature_Type__c":"Symptom"}},{"Provided_By__c":"ORPHA:550","HPO_Frequency__c":"Very frequent (80-99%)","Feature__r":{"HPO_Description__c":"A loss of global cognitive ability of sufficient amount to interfere with normal social or occupational function. Dementia represents a loss of previously present cognitive abilities, generally in adults, and can affect memory, thinking, language, judgment, and behavior.","HPO_Feature_URL__c":"https://hpo.jax.org/browse/term/HP:0000726","HPO_Synonym__c":"Dementia; Dementia, progressive; Progressive dementia","HPO_Name__c":"Dementia","Feature_System__c":"Nervous System","HPO_Feature_Type__c":"Symptom"}},{"Provided_By__c":"ORPHA:550","HPO_Frequency__c":"Occasional (5-29%)","Feature__r":{"HPO_Description__c":"Absence of the corpus callosum as a result of the failure of the corpus callosum to develop, which can be the result of a failure in any one of the multiple steps of callosal development including cellular proliferation and migration, axonal growth or glial patterning at the midline.","HPO_Feature_URL__c":"https://hpo.jax.org/browse/term/HP:0001274","HPO_Synonym__c":"Absence of corpus callosum; Absent corpus callosum; Agenesis of the corpus callosum; Callosal agenesis; Corpus callosum agenesis; Dysplastic or absent corpus callosum","HPO_Name__c":"Agenesis of corpus callosum","Feature_System__c":"Nervous System","HPO_Feature_Type__c":"Symptom"}},{"Provided_By__c":"ORPHA:550","HPO_Frequency__c":"Occasional (5-29%)","Feature__r":{"HPO_Description__c":"Atrophy of the cortex of the cerebrum.","HPO_Feature_URL__c":"https://hpo.jax.org/browse/term/HP:0002120","HPO_Synonym__c":"Cerebral cortex atrophy; Cortical atrophy; Decrease in size of the outer layer of the brain due to loss of brain cells","HPO_Name__c":"Cerebral cortical atrophy","Feature_System__c":"Nervous System","HPO_Feature_Type__c":"Symptom"}},{"Provided_By__c":"ORPHA:550","HPO_Frequency__c":"Very frequent (80-99%)","Feature__r":{"HPO_Description__c":"An acquired language impairment of some or all of the abilities to produce or comprehend speech and to read or write.","HPO_Feature_URL__c":"https://hpo.jax.org/browse/term/HP:0002381","HPO_Synonym__c":"Difficulty finding words; Losing words; Loss of words","HPO_Name__c":"Aphasia","Feature_System__c":"Nervous System","HPO_Feature_Type__c":"Symptom"}},{"Provided_By__c":"ORPHA:550","HPO_Frequency__c":"Occasional (5-29%)","Feature__r":{"HPO_Description__c":"A chronic condition in which the pancreas produces little or no insulin. Type I diabetes mellitus is manifested by the sudden onset of severe hyperglycemia with rapid progression to diabetic ketoacidosis unless treated with insulin.","HPO_Feature_URL__c":"https://hpo.jax.org/browse/term/HP:0100651","HPO_Synonym__c":"Diabetes mellitus Type I; Juvenile diabetes mellitus; Type 1 diabetes; Type I diabetes","HPO_Name__c":"Type I diabetes mellitus","Feature_System__c":"Endocrine System","HPO_Feature_Type__c":"Symptom"}},{"Provided_By__c":"ORPHA:550","HPO_Frequency__c":"Frequent (30-79%)","Feature__r":{"HPO_Description__c":"The presence of calcium deposition affecting one or more structures of the basal ganglia.","HPO_Feature_URL__c":"https://hpo.jax.org/browse/term/HP:0002135","HPO_Synonym__c":"Basal ganglia calcifications; Basal ganglion calcification; Calcification of the basal ganglia","HPO_Name__c":"Basal ganglia calcification","Feature_System__c":"Nervous System; Musculoskeletal System","HPO_Feature_Type__c":"Symptom"}},{"Provided_By__c":"ORPHA:550","HPO_Frequency__c":"Occasional (5-29%)","Feature__r":{"HPO_Description__c":"Increased levels of protein in the urine.","HPO_Feature_URL__c":"https://hpo.jax.org/browse/term/HP:0000093","HPO_Synonym__c":"High urine protein levels; Protein in urine","HPO_Name__c":"Proteinuria","HPO_Feature_Type__c":"Lab"}},{"Provided_By__c":"ORPHA:550","HPO_Frequency__c":"Frequent (30-79%)","Feature__r":{"HPO_Description__c":"A type of hearing impairment in one or both ears related to an abnormal functionality of the cochlear nerve.","HPO_Feature_URL__c":"https://hpo.jax.org/browse/term/HP:0000407","HPO_Synonym__c":"Hearing loss, sensorineural; Sensorineural deafness; Sensorineural hearing loss","HPO_Name__c":"Sensorineural hearing impairment","HPO_Feature_Type__c":"Symptom"}},{"Provided_By__c":"ORPHA:550","HPO_Frequency__c":"Frequent (30-79%)","Feature__r":{"HPO_Description__c":"Encephalopathy is a term that means brain disease, damage, or malfunction. In general, encephalopathy is manifested by an altered mental state.","HPO_Feature_URL__c":"https://hpo.jax.org/browse/term/HP:0001298","HPO_Name__c":"Encephalopathy","Feature_System__c":"Nervous System","HPO_Feature_Type__c":"Symptom"}},{"Provided_By__c":"ORPHA:550","HPO_Frequency__c":"Occasional (5-29%)","Feature__r":{"HPO_Description__c":"Body temperature elevated above the normal range.","HPO_Feature_URL__c":"https://hpo.jax.org/browse/term/HP:0001945","HPO_Synonym__c":"Fever; Hyperthermia; Pyrexia","HPO_Name__c":"Fever","HPO_Feature_Type__c":"Symptom"}}],"tags":{"Cause":["Genetics","Inborn Errors of Metabolism","Mitochondrial"],"Disease Category":["Genetics","Neurology","Inborn Errors of Metabolism","Congenital Abnormality","Mitochondrial"],"Specialist":["Genetics","Cardiology","Neurology","Ophthalmology","Otolaryngology","Epilepsy","Neuro-Ophthalmology","Neurodevelopmental disabilities","Neuromuscular medicine","Pediatrics"],"Account":["Mitochondrial","Peripheral Neuropathy","Epilepsy","Cardiomyopathy"]},"synonyms":["juvenile myopathy, encephalopathy, lactic acidosis, stroke"," melas"," melas - mitochondrial encephalopathy, lactic acidosis and stroke-like episodes"," mitochondrial encephalomyopathy, lactic acidosis and stroke"," mitochondrial encephalomyopathy, lactic acidosis and stroke-like episodes"," mitochondrial encephalopathy, lactic acidosis, and stroke-like episodes"," mitochondrial myopathy, encephalopathy, lactic acidosis and stroke-like episodes"," mitochondrial myopathy, encephalopathy, lactic acidosis, and stroke-like episodes"]}