{"Name":"Hereditary myopathy with lactic acidosis due to ISCU deficiency","DiseaseID__c":"GARD:0016643","id":16643,"encodedName":"hereditary-myopathy-with-lactic-acidosis-due-to-iscu-deficiency","IsDeleted":false,"Disease_Name_Full__c":"Hereditary myopathy with lactic acidosis due to ISCU deficiency","Xref_IDs__c":"699268002; C1850718; C564972; MEDGEN:342573; MONDO:0009706; OMIM:255125; ORPHA:43115","USA_Estimate__c":"1,000","No_of_Specialist_Tagsa__c":4,"No_of_ClinGen_records__c":0,"No_of_GeneReviews__c":0,"No_of_HHS_records__c":1,"World_Estimate__c":"1 to 8,000","No_of_HRSA_records__c":0,"Evidence_Based_Score__c":1,"No_of_Disease_Descriptions__c":5,"Disease_Characteristics_Score__c":7,"No_of_Age_at_Onset__c":1,"Description_Source__c":"MONDO:0009706","Disease_Description__c":"A rare disorder of energy metabolism characterized clinically by myopathy with severe exercise intolerance, and biochemically by deficiencies of skeletal muscle mitochondrial respiratory chain enzymes, succinate dehydrogenase and aconitase.","GARD_Name__c":"Hereditary myopathy with lactic acidosis due to ISCU deficiency","GARD_Synonym__c":"aconitase deficiency; hereditary myopathy with lactic acidosis; hml; iron-sulfur cluster deficiency myopathy; iscu myopathy; myoglobinuria due to abnormal glycolysis; myopathy with deficiency of iron-sulfur cluster assembly enzyme; myopathy with deficiency of iron-sulphur cluster assembly enzyme; myopathy with deficiency of succinate dehydrogenase and aconitase; myopathy with exercise intolerance, swedish type; myopathy with lactic acidosis, hereditary","Curated_Disease_Description_Source__c":"ORPHA:43115","Curated_Disease_Description__c":"Myopathy with deficiency of iron-sulfur cluster assembly enzyme is an inherited disorder that primarily affects muscles used for movement (skeletal muscles). This condition does not usually affect other types of muscle, such as the heart (cardiac) muscle. From early childhood, affected individuals experience extreme fatigue in response to physical activity (exercise intolerance). Mild exertion results in a rapid heartbeat (tachycardia), shortness of breath, and muscle weakness and pain. However, people with this condition typically have normal muscle strength when they are at rest. Prolonged or recurrent physical activity causes more severe signs and symptoms, including a breakdown of muscle tissue (rhabdomyolysis). The destruction of muscle tissue releases a protein called myoglobin, which is processed by the kidneys and released in the urine (myoglobinuria). Myoglobin causes the urine to be red or brown. This protein can also damage the kidneys, in some cases leading to life-threatening kidney failure. In most affected individuals, the muscle problems associated with this condition do not worsen with time. However, at least two people with a severe variant of this disorder have experienced progressive muscle weakness and wasting starting in childhood.","Curated_USA_Estimate_Source__c":null,"Curated_USA_Estimate__c":"1,000","Age_at_Onset_Snippet_Text__c":"as a Child","SourceID__c":"ORPHA:43115","Deprecated__c":"No","Disease_Concept_Type__c":"Rare Disease Entity","MONDO_ID__c":"MONDO:0009706","ORPHANET_ID__c":"ORPHA:43115","Replaced_By_ID__c":null,"Display_Spanish_Disease_Name__c":"Miopatía hereditaria con acidosis láctica por deficiencia de iscu","Spanish_Description_Source__c":"ORPHA:43115","Spanish_Description__c":"Es una enfermedad poco frecuente caracterizada por una miopatía con una grave intolerancia al ejercicio así como por deficiencia de succinato deshidrogenasa y de aconitasa en el músculo esquelético.","Spanish_Disease_Name__c":"miopatía hereditaria con acidosis láctica por deficiencia de iscu","Spanish_GARD_Synonym__c":"miopatía asociada a iscu; miopatía con intolerancia al ejercicio tipo sueco; miopatía por deficiencia de succinato deshidrogenasa y aconitasa","Category_Linearization__c":"ORPHA:68367","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":"Myopathy with deficiency of iron-sulfur cluster assembly enzyme is an inherited disorder that primarily affects muscles used for movement (skeletal muscles). This condition does not usually affect other types of muscle, such as the heart (cardiac) muscle. From early childhood, affected individuals experience extreme fatigue in response to physical activity (exercise intolerance). Mild exertion results in a rapid heartbeat (tachycardia), shortness of breath, and muscle weakness and pain. However, people with this condition typically have normal muscle strength when they are at rest. Prolonged or recurrent physical activity causes more severe signs and symptoms, including a breakdown of muscle tissue (rhabdomyolysis). The destruction of muscle tissue releases a protein called myoglobin, which is processed by the kidneys and released in the urine (myoglobinuria). Myoglobin causes the urine to be red or brown. This protein can also damage the kidneys, in some cases leading to life-threatening kidney failure. In most affected individuals, the muscle problems associated with this condition do not worsen with time. However, at least two people with a severe variant of this disorder have experienced progressive muscle weakness and wasting starting in childhood.","Curated_Disease_Description_Source__c":"ORPHA:43115","GARD_Synonym__c":"aconitase deficiency; hereditary myopathy with lactic acidosis; hml; iron-sulfur cluster deficiency myopathy; iscu myopathy; myoglobinuria due to abnormal glycolysis; myopathy with deficiency of iron-sulfur cluster assembly enzyme; myopathy with deficiency of iron-sulphur cluster assembly enzyme; myopathy with deficiency of succinate dehydrogenase and aconitase; myopathy with exercise intolerance, swedish type; myopathy with lactic acidosis, hereditary","Name":"Hereditary myopathy with lactic acidosis due to ISCU deficiency","Curated_USA_Estimate__c":"1,000","estimateUsa":"1,000"}],"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":"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":"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":"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":"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:43115"}],"External_Identifier_Disease__c":[{"URL__c":"https://www.ncbi.nlm.nih.gov/medgen/?term=342573","Source__c":"C1850718","Xref__c":"MEDGEN:342573"},{"URL__c":"https://uts.nlm.nih.gov/uts/umls/concept/C1850718","Source__c":"C1850718","Xref__c":"C1850718"},{"URL__c":"https://www.ncbi.nlm.nih.gov/mesh/C564972","Source__c":"MONDO:0009706","Xref__c":"C564972"},{"URL__c":"https://www.orpha.net/en/disease/detail/43115","Source__c":"C1850718; MONDO:0009706; ORPHA:43115","Xref__c":"ORPHA:43115"},{"URL__c":"https://www.omim.org/entry/255125","Source__c":"C1850718; MONDO:0009706; ORPHA:43115","Xref__c":"OMIM:255125"},{"URL__c":"https://browser.ihtsdotools.org/?perspective=full&conceptId1=699268002","Source__c":"C1850718; MONDO:0009706","Xref__c":"699268002"},{"URL__c":"https://medlineplus.gov/genetics/condition/myopathy-with-deficiency-of-iron-sulfur-cluster-assembly-enzyme","Source__c":"GARD:0016643","Xref__c":"https://medlineplus.gov/genetics/condition/myopathy-with-deficiency-of-iron-sulfur-cluster-assembly-enzyme"},{"URL__c":"http://purl.obolibrary.org/obo/MONDO_0009706","Source__c":"GARD:0016643","Xref__c":"MONDO:0009706"}],"GARD_Disease_Gene__c":[{"GeneSymbol__c":"ISCU","GHR_URL__c":"https://medlineplus.gov/genetics/gene/iscu","Gene_Type__c":"protein-coding gene","Causal_Gene__c":true}],"Inheritance__c":["Autosomal recessive"],"GARD_Disease_Feature__c":[{"Provided_By__c":"OMIM:255125","HPO_Frequency__c":"Very frequent (80-99%)","Feature__r":{"HPO_Description__c":"Increased susceptibility to fatigue.","HPO_Feature_URL__c":"https://hpo.jax.org/browse/term/HP:0003388","HPO_Name__c":"Easy fatigability","Feature_System__c":"Nervous System; Musculoskeletal System","HPO_Feature_Type__c":"Symptom"}},{"Provided_By__c":"OMIM:255125","HPO_Frequency__c":"Very frequent (80-99%)","Feature__r":{"HPO_Description__c":"Ophthalmoplegia is a paralysis or weakness of one or more of the muscles that control eye movement.","HPO_Feature_URL__c":"https://hpo.jax.org/browse/term/HP:0000597","HPO_Synonym__c":"Extraocular muscle palsy; Extraocular muscle paralysis; Weakness of extraocular eye movement; Weakness of muscles controlling eye movement","HPO_Name__c":"Ophthalmoparesis","HPO_Feature_Type__c":"Symptom"}},{"Provided_By__c":"OMIM:255125","Feature__r":{"HPO_Description__c":"Difficult or labored breathing. Dyspnea is a subjective feeling only the patient can rate, e.g., on a Borg scale.","HPO_Feature_URL__c":"https://hpo.jax.org/browse/term/HP:0002094","HPO_Synonym__c":"Abnormal breathing; Breathing difficulty; Difficult to breathe; Difficulty breathing; Shortness of breath; Trouble breathing","HPO_Name__c":"Dyspnea","Feature_System__c":"Respiratory system","HPO_Feature_Type__c":"Symptom"}},{"Provided_By__c":"OMIM:255125","Feature__r":{"HPO_Description__c":"A sensation that the heart is pounding or racing, which is a non-specific sign but may be a manifestation of arrhythmia.","HPO_Feature_URL__c":"https://hpo.jax.org/browse/term/HP:0001962","HPO_Synonym__c":"Heart palpitations; Missed heart beat; Palpitations; Skipped heart beat","HPO_Name__c":"Palpitations","Feature_System__c":"Cardiovascular System","HPO_Feature_Type__c":"Symptom"}},{"Provided_By__c":"OMIM:255125","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":"OMIM:255125","HPO_Frequency__c":"Very frequent (80-99%)","Feature__r":{"HPO_Description__c":"Hypotonia is an abnormally low muscle tone (the amount of tension or resistance to movement in a muscle). Even when relaxed, muscles have a continuous and passive partial contraction which provides some resistance to passive stretching. Hypotonia thus manifests as diminished resistance to passive stretching. Hypotonia is not the same as muscle weakness, although the two conditions can co-exist.","HPO_Feature_URL__c":"https://hpo.jax.org/browse/term/HP:0001252","HPO_Synonym__c":"Low muscle tone; Low or weak muscle tone; Muscle hypotonia; Muscular hypotonia","HPO_Name__c":"Hypotonia","Feature_System__c":"Musculoskeletal System","HPO_Feature_Type__c":"Symptom"}},{"Provided_By__c":"OMIM:255125","HPO_Frequency__c":"Very frequent (80-99%)","Feature__r":{"HPO_Description__c":"An abnormally high degree of muscle fiber size variation. This phenotypic feature can be observed upon muscle biopsy.","HPO_Feature_URL__c":"https://hpo.jax.org/browse/term/HP:0003557","HPO_Synonym__c":"Increased fiber size variation; Increased variability in muscle fiber size; Increased variation in fiber size; Increased variation in muscle fiber size; Variation in muscle fiber size","HPO_Name__c":"Increased variability in muscle fiber diameter","Feature_System__c":"Musculoskeletal System","HPO_Feature_Type__c":"Symptom"}},{"Provided_By__c":"OMIM:255125","HPO_Frequency__c":"Very frequent (80-99%)","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":"OMIM:255125","Feature__r":{"HPO_Description__c":"Sudden and involuntary contractions of one or more muscles.","HPO_Feature_URL__c":"https://hpo.jax.org/browse/term/HP:0003394","HPO_Synonym__c":"Muscle cramps; Muscle spasms","HPO_Name__c":"Muscle spasm","Feature_System__c":"Musculoskeletal System","HPO_Feature_Type__c":"Symptom"}},{"Provided_By__c":"OMIM:255125","Feature__r":{"HPO_Description__c":"An abnormal increase in intracellular lipid droplets In a muscle. The number and size of these drops can increase with somd disorders of lipid metabolism affecting muscle. See PMID 20691590 for histological images.","HPO_Feature_URL__c":"https://hpo.jax.org/browse/term/HP:0012240","HPO_Name__c":"Increased intramyocellular lipid droplets","Feature_System__c":"Musculoskeletal System","HPO_Feature_Type__c":"Lab"}},{"Provided_By__c":"OMIM:255125","Feature__r":{"HPO_Description__c":"Sideroblastic anemia results from a defect in the incorporation of iron into the heme molecule. A sideroblast is an erythroblast that has stainable deposits of iron in cytoplasm (this can be demonstrated by Prussian blue staining).","HPO_Feature_URL__c":"https://hpo.jax.org/browse/term/HP:0001924","HPO_Synonym__c":"Hypersideremic anemia","HPO_Name__c":"Sideroblastic anemia","Feature_System__c":"Blood and Blood-Forming Tissue","HPO_Feature_Type__c":"Symptom"}},{"Provided_By__c":"OMIM:255125","HPO_Frequency__c":"Very frequent (80-99%)","Feature__r":{"HPO_Description__c":"Absence of neurologic reflexes such as the knee-jerk reaction.","HPO_Feature_URL__c":"https://hpo.jax.org/browse/term/HP:0001284","HPO_Synonym__c":"Absent deep tendon reflexes; Absent tendon reflexes; Deep tendon reflexes absent; Loss of deep tendon reflexes; Lost deep tendon reflexes","HPO_Name__c":"Areflexia","Feature_System__c":"Nervous System","HPO_Feature_Type__c":"Symptom"}},{"Provided_By__c":"OMIM:255125","Feature__r":{"HPO_Description__c":"An abnormally increased number of mitochondria in the cytoplasma adjacent to the sarcolemma (muscle cell membrane), whereby the mitochondria also possess an abnormal morphology.","HPO_Feature_URL__c":"https://hpo.jax.org/browse/term/HP:0003548","HPO_Name__c":"Subsarcolemmal accumulations of abnormally shaped mitochondria","Feature_System__c":"Musculoskeletal System","HPO_Feature_Type__c":"Symptom"}},{"Provided_By__c":"OMIM:255125","HPO_Frequency__c":"Very frequent (80-99%)","Feature__r":{"HPO_Feature_URL__c":"https://hpo.jax.org/browse/term/HP:0002359","HPO_Synonym__c":"Frequent falls","HPO_Name__c":"Frequent falls","Feature_System__c":"Musculoskeletal System","HPO_Feature_Type__c":"Symptom"}},{"Provided_By__c":"OMIM:255125","HPO_Frequency__c":"Very frequent (80-99%)","Feature__r":{"HPO_Description__c":"The presence of skeletal muscular atrophy (which is also known as amyotrophy).","HPO_Feature_URL__c":"https://hpo.jax.org/browse/term/HP:0003202","HPO_Synonym__c":"Amyotrophy; Amyotrophy involving the extremities; Muscle atrophy; Muscle atrophy, neurogenic; Muscle degeneration; Muscle hypotrophy; Muscle wasting; Muscular atrophy; Neurogenic muscle atrophy; Neurogenic muscle atrophy, especially in the lower limbs; Neurogenic muscular atrophy","HPO_Name__c":"Skeletal muscle atrophy","Feature_System__c":"Musculoskeletal System","HPO_Feature_Type__c":"Symptom"}},{"Provided_By__c":"OMIM:255125","HPO_Frequency__c":"Very frequent (80-99%)","Feature__r":{"HPO_Description__c":"An elevation of the level of the enzyme creatine kinase (also known as creatine phosphokinase (CK; EC 2.7.3.2) in the blood. CK levels can be elevated in a number of clinical disorders such as myocardial infarction, rhabdomyolysis, and muscular dystrophy.","HPO_Feature_URL__c":"https://hpo.jax.org/browse/term/HP:0003236","HPO_Synonym__c":"Elevated blood creatine phosphokinase; Elevated circulating creatine phosphokinase; Elevated creatine kinase; Elevated serum CPK; Elevated serum creatine kinase; Elevated serum creatine phosphokinase; High serum creatine kinase; Increased CPK; Increased creatine kinase; Increased creatine phosphokinase; Increased serum CK; Increased serum creatine kinase; Increased serum creatine phosphokinase","HPO_Name__c":"Elevated circulating creatine kinase concentration","HPO_Feature_Type__c":"Lab"}},{"Provided_By__c":"OMIM:255125","HPO_Frequency__c":"Very frequent (80-99%)","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":"OMIM:255125","Feature__r":{"HPO_Description__c":"Presence of myoglobin in the urine.","HPO_Feature_URL__c":"https://hpo.jax.org/browse/term/HP:0002913","HPO_Name__c":"Myoglobinuria","HPO_Feature_Type__c":"Lab"}},{"Provided_By__c":"OMIM:255125","HPO_Frequency__c":"Very frequent (80-99%)","Feature__r":{"HPO_Description__c":"Reduced strength of the musculature of the distal extremities.","HPO_Feature_URL__c":"https://hpo.jax.org/browse/term/HP:0002460","HPO_Synonym__c":"Distal limb muscle weakness; Distal limb weakness; Distal muscular weakness; Distal paresis; Muscle weakness, distal; Muscle weakness, distal limbs, due to neuronopathy; Weakness of distal muscles; Weakness of outermost muscles","HPO_Name__c":"Distal muscle weakness","Feature_System__c":"Musculoskeletal System","HPO_Feature_Type__c":"Symptom"}},{"Provided_By__c":"OMIM:255125","Feature__r":{"HPO_Feature_URL__c":"https://hpo.jax.org/browse/term/HP:0008306","HPO_Name__c":"Abnormal iron deposition in mitochondria","HPO_Feature_Type__c":"Lab"}},{"Provided_By__c":"OMIM:255125","HPO_Frequency__c":"Very frequent (80-99%)","Feature__r":{"HPO_Description__c":"A reduction in the activity of the mitochondrial respiratory chain complex III, which is part of the electron transport chain in mitochondria.","HPO_Feature_URL__c":"https://hpo.jax.org/browse/term/HP:0011924","HPO_Name__c":"Decreased activity of mitochondrial complex III","HPO_Feature_Type__c":"Lab"}},{"Provided_By__c":"OMIM:255125","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":"OMIM:255125","HPO_Frequency__c":"Occasional (5-29%)","Feature__r":{"HPO_Description__c":"Breakdown of muscle fibers that leads to the release of muscle fiber contents (myoglobin) into the bloodstream.","HPO_Feature_URL__c":"https://hpo.jax.org/browse/term/HP:0003201","HPO_Synonym__c":"Breakdown of skeletal muscle","HPO_Name__c":"Rhabdomyolysis","Feature_System__c":"Musculoskeletal System","HPO_Feature_Type__c":"Symptom"}},{"Provided_By__c":"OMIM:255125","HPO_Frequency__c":"Very frequent (80-99%)","Feature__r":{"HPO_Feature_URL__c":"https://hpo.jax.org/browse/term/HP:0001488","HPO_Synonym__c":"Drooping of both upper eyelids","HPO_Name__c":"Bilateral ptosis","HPO_Feature_Type__c":"Symptom"}},{"Provided_By__c":"OMIM:255125","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":"OMIM:255125","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":"OMIM:255125","HPO_Frequency__c":"Very frequent (80-99%)","Feature__r":{"HPO_Description__c":"A reduction in the activity of the mitochondrial respiratory chain complex II, which is part of the electron transport chain in mitochondria.","HPO_Feature_URL__c":"https://hpo.jax.org/browse/term/HP:0008314","HPO_Name__c":"Decreased activity of mitochondrial complex II","HPO_Feature_Type__c":"Lab"}},{"Provided_By__c":"OMIM:255125","HPO_Frequency__c":"Very frequent (80-99%)","Feature__r":{"HPO_Description__c":"A reduction in the activity of the mitochondrial respiratory chain complex I, which is part of the electron transport chain in mitochondria.","HPO_Feature_URL__c":"https://hpo.jax.org/browse/term/HP:0011923","HPO_Name__c":"Decreased activity of mitochondrial complex I","HPO_Feature_Type__c":"Lab"}},{"Provided_By__c":"OMIM:255125","HPO_Frequency__c":"Very frequent (80-99%)","Feature__r":{"HPO_Description__c":"An abnormal decreased number of leukocytes in the blood.","HPO_Feature_URL__c":"https://hpo.jax.org/browse/term/HP:0001882","HPO_Synonym__c":"Decreased blood leukocyte number; Leukopenia; Low white blood cell count","HPO_Name__c":"Decreased total leukocyte count","Feature_System__c":"Immune System; Blood and Blood-Forming Tissue","HPO_Feature_Type__c":"Symptom"}},{"Provided_By__c":"OMIM:255125","Feature__r":{"HPO_Description__c":"A type of myopathy associated with mitochondrial disease and characterized by findings on biopsy such as ragged red muscle fibers.","HPO_Feature_URL__c":"https://hpo.jax.org/browse/term/HP:0003737","HPO_Name__c":"Mitochondrial myopathy","Feature_System__c":"Musculoskeletal System","HPO_Feature_Type__c":"Symptom"}},{"Provided_By__c":"OMIM:255125","HPO_Frequency__c":"Very frequent (80-99%)","Feature__r":{"HPO_Description__c":"A reduction in the activity of the mitochondrial respiratory chain complex IV, which is part of the electron transport chain in mitochondria.","HPO_Feature_URL__c":"https://hpo.jax.org/browse/term/HP:0008347","HPO_Name__c":"Decreased activity of mitochondrial complex IV","HPO_Feature_Type__c":"Lab"}},{"Provided_By__c":"OMIM:255125","HPO_Frequency__c":"Very frequent (80-99%)","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"}}],"tags":{"Cause":["Genetics","Inborn Errors of Metabolism","Mitochondrial"],"Disease Category":["Genetics","Neurology","Inborn Errors of Metabolism","Mitochondrial"],"Specialist":["Genetics","Neurology","Neuromuscular medicine","Pediatrics"],"Account":["Mitochondrial"]},"synonyms":["aconitase deficiency"," hereditary myopathy with lactic acidosis"," hml"," iron-sulfur cluster deficiency myopathy"," iscu myopathy"," myoglobinuria due to abnormal glycolysis"," myopathy with deficiency of iron-sulfur cluster assembly enzyme"," myopathy with deficiency of iron-sulphur cluster assembly enzyme"," myopathy with deficiency of succinate dehydrogenase and aconitase"," myopathy with exercise intolerance, swedish type"," myopathy with lactic acidosis, hereditary"]}