{"Name":"Classic homocystinuria","DiseaseID__c":"GARD:0006667","id":6667,"encodedName":"classic-homocystinuria","IsDeleted":false,"Disease_Name_Full__c":"Classic homocystinuria","Xref_IDs__c":"24308003; C0751202; MEDGEN:199606; MONDO:0009352; OMIM:236200; ORPHA:394","USA_Estimate__c":"50,000","No_of_Specialist_Tagsa__c":7,"No_of_ClinGen_records__c":0,"No_of_GeneReviews__c":0,"No_of_HHS_records__c":0,"World_Estimate__c":"80,000 to 800,000","No_of_HRSA_records__c":0,"Evidence_Based_Score__c":0,"No_of_Disease_Descriptions__c":4,"Disease_Characteristics_Score__c":8,"No_of_Age_at_Onset__c":3,"Description_Source__c":"MONDO:0009352","Disease_Description__c":"A rare metabolic disease of methionine catabolism characterized by accumulation of methionine and homocysteine with clinical involvement of the eye, skeletal system, vascular system and central nervous system (CNS).","GARD_Name__c":"Classic homocystinuria","GARD_Synonym__c":"cbs deficiency; cystathionine beta-synthase deficiency; deficiency of beta-thionase; deficiency of methylcysteine synthase; deficiency of serine sulfhydrase; homocystinuria due to cbs deficiency; homocystinuria due to cystathionine beta-synthase deficiency; homocystinuria with or without response to pyridoxine; homocystinuria, b6-responsive and nonresponsive types; thrombosis, hyperhomocysteinemic","Curated_Disease_Description_Source__c":"GARD:0006667","Curated_Disease_Description__c":"Classic homocystinuria is an inherited disorder in which the body is unable to correctly use the amino acid, homocysteine, one of the building blocks of protein. This form of homocystinuria is caused by a genetic change in the CBS gene, which leads to low levels or absence of an enzyme called cystathionine beta-synthase (CBS). When CBS is absent or not working right, homocysteine and other toxic chemicals build up in the blood and urine. Symptoms of this disorder include poor growth and slow weight gain in infancy. Additional symptoms include nearsightedness, dislocation of the lens of the eye, an increased risk of blood clots, and developmental problems. Classic homocystinuria is inherited in an autosomal recessive pattern.","Curated_USA_Estimate_Source__c":null,"Curated_USA_Estimate__c":"50,000","Age_at_Onset_Snippet_Text__c":"from Childhood to Adulthood","SourceID__c":"ORPHA:394","Deprecated__c":"No","Disease_Concept_Type__c":"Rare Disease Entity","MONDO_ID__c":"MONDO:0009352","ORPHANET_ID__c":"ORPHA:394","Replaced_By_ID__c":null,"Display_Spanish_Disease_Name__c":"Homocistinuria por deficiencia de cistationina beta-sintasa","Spanish_Description_Source__c":"ORPHA:394","Spanish_Description__c":"Es una enfermedad metabólica poco frecuente del catabolismo de la metionina caracterizada por el acúmulo de metionina y homocisteína con afectación clínica del ojo, el sistema esquelético, el sistema vascular y el sistema nervioso central (SNC).","Spanish_Disease_Name__c":"homocistinuria por deficiencia de cistationina beta-sintasa","Spanish_GARD_Synonym__c":"deficiencia de cistationina beta-sintasa; homocistinuria clásica; homocistinuria por deficiencia de cbs","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":"Classic homocystinuria is an inherited disorder in which the body is unable to correctly use the amino acid, homocysteine, one of the building blocks of protein. This form of homocystinuria is caused by a genetic change in the CBS gene, which leads to low levels or absence of an enzyme called cystathionine beta-synthase (CBS). When CBS is absent or not working right, homocysteine and other toxic chemicals build up in the blood and urine. Symptoms of this disorder include poor growth and slow weight gain in infancy. Additional symptoms include nearsightedness, dislocation of the lens of the eye, an increased risk of blood clots, and developmental problems. Classic homocystinuria is inherited in an autosomal recessive pattern.","Curated_Disease_Description_Source__c":"GARD:0006667","GARD_Synonym__c":"cbs deficiency; cystathionine beta-synthase deficiency; deficiency of beta-thionase; deficiency of methylcysteine synthase; deficiency of serine sulfhydrase; homocystinuria due to cbs deficiency; homocystinuria due to cystathionine beta-synthase deficiency; homocystinuria with or without response to pyridoxine; homocystinuria, b6-responsive and nonresponsive types; thrombosis, hyperhomocysteinemic","Name":"Classic homocystinuria","Curated_USA_Estimate__c":"50,000","estimateUsa":"50,000"}],"Organization_Supported_Diseases__c":[{"Account_Name__c":"flok","Website__c":"https://flok.org/"},{"Account_Name__c":"Metabolic Support UK","Website__c":"https://www.metabolicsupportuk.org"},{"Account_Name__c":"HCU Network America","Website__c":"https://hcunetworkamerica.org/"}],"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":"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":"Epilepsy","Tag_Category__c":"Account;Specialist","curated_tag_name":"Epilepsy"},{"Tag_Name__c":"Glaucoma","Tag_Category__c":"Account","curated_tag_name":"Glaucoma"},{"Tag_Name__c":"Anterior segment of Eye","Tag_Category__c":"Specialist","curated_tag_name":"Front part of eye disease"},{"Tag_Name__c":"Neurodevelopmental disabilities","Tag_Category__c":"Specialist","curated_tag_name":"Neurodevelopmental disabilities"},{"Tag_Name__c":"Pediatrics","Tag_Category__c":"Specialist"}],"Age_At_Onset__c":[{"Age_At_Onset__c":"Adult","Provided_By__c":"ORPHA:394"},{"Age_At_Onset__c":"Childhood","Provided_By__c":"ORPHA:394"},{"Age_At_Onset__c":"Adolescent","Provided_By__c":"ORPHA:394"}],"Diagnosis__c":[{"Type__c":"NEWBORN","Category__c":"Core","Curie__c":"http://newbornscreeningcodes.nlm.nih.gov/nb/sc/condition/HCY"},{"Type__c":"GTR","Curie__c":"MEDGEN:C0751202"}],"External_Identifier_Disease__c":[{"URL__c":"https://raresource.nih.gov/diseases/filter/0006667","Source__c":"RareSource"},{"URL__c":"https://www.ncbi.nlm.nih.gov/books/NBK1524","Source__c":"Gene Review","Xref__c":"NBK1524"},{"URL__c":"https://browser.ihtsdotools.org/?perspective=full&conceptId1=24308003","Source__c":"C0751202; MONDO:0009352","Xref__c":"24308003"},{"URL__c":"https://www.ncbi.nlm.nih.gov/medgen/?term=199606","Source__c":"C0751202","Xref__c":"MEDGEN:199606"},{"URL__c":"https://www.omim.org/entry/236200","Source__c":"C0751202; MONDO:0009352; ORPHA:394","Xref__c":"OMIM:236200"},{"URL__c":"https://www.orpha.net/en/disease/detail/394","Source__c":"C0751202; MONDO:0009352; ORPHA:394","Xref__c":"ORPHA:394"},{"URL__c":"https://uts.nlm.nih.gov/uts/umls/concept/C0751202","Source__c":"C0751202","Xref__c":"C0751202"},{"URL__c":"http://purl.obolibrary.org/obo/MONDO_0009352","Source__c":"GARD:0006667","Xref__c":"MONDO:0009352"}],"GARD_Disease_Gene__c":[{"GeneSymbol__c":"CBS","GHR_URL__c":"https://medlineplus.gov/genetics/gene/cbs","Gene_Type__c":"protein-coding gene","Causal_Gene__c":true}],"Inheritance__c":["Autosomal recessive"],"GARD_Disease_Feature__c":[{"Provided_By__c":"ORPHA:394","HPO_Frequency__c":"Occasional (5-29%)","Feature__r":{"HPO_Description__c":"A reduction of skin color related to a decrease in melanin production and deposition.","HPO_Feature_URL__c":"https://hpo.jax.org/browse/term/HP:0001010","HPO_Synonym__c":"Hypopigmentation; Hypopigmented skin; Patchy lightened skin","HPO_Name__c":"Hypopigmentation of the skin","Feature_System__c":"Skin System","HPO_Feature_Type__c":"Symptom"}},{"Provided_By__c":"ORPHA:394","HPO_Frequency__c":"Occasional (5-29%)","Feature__r":{"HPO_Description__c":"Partial dislocation of the lens of the eye.","HPO_Feature_URL__c":"https://hpo.jax.org/browse/term/HP:0001132","HPO_Synonym__c":"Partially dislocated lens","HPO_Name__c":"Lens subluxation","HPO_Feature_Type__c":"Symptom"}},{"Provided_By__c":"ORPHA:394","HPO_Frequency__c":"Occasional (5-29%)","Feature__r":{"HPO_Description__c":"Atypical behavior is an abnormality in a person's actions that can be controlled or modulated by the will of the individual. While abnormal behaviors can be difficult to control, they are distinct from other abnormal actions that cannot be affected by the individual's will.","HPO_Feature_URL__c":"https://hpo.jax.org/browse/term/HP:0000708","HPO_Synonym__c":"Behavioral abnormality; Behavioral changes; Behavioral disorders; Behavioral disturbances; Behavioral problems; Behavioral symptoms; Behavioral/psychiatric abnormalities; Behavioural symptoms; Behavioural/Psychiatric abnormality; Psychiatric disorders; Psychiatric disturbances","HPO_Name__c":"Atypical behavior","Feature_System__c":"Nervous System","HPO_Feature_Type__c":"Symptom"}},{"Provided_By__c":"ORPHA:394","HPO_Frequency__c":"Occasional (5-29%)","Feature__r":{"HPO_Description__c":"Lack of desire to eat (loss of appetite).","HPO_Feature_URL__c":"https://hpo.jax.org/browse/term/HP:0002039","HPO_Synonym__c":"Anorexia; Deliberately not eating; Obsessive dieting; Refusing to eat","HPO_Name__c":"Anorexia","Feature_System__c":"Digestive System","HPO_Feature_Type__c":"Symptom"}},{"Provided_By__c":"ORPHA:394","HPO_Frequency__c":"Frequent (30-79%)","Feature__r":{"HPO_Description__c":"The presence of chronic increased pressure in the systemic arterial system.","HPO_Feature_URL__c":"https://hpo.jax.org/browse/term/HP:0000822","HPO_Synonym__c":"Arterial hypertension; Systemic hypertension","HPO_Name__c":"Hypertension","Feature_System__c":"Cardiovascular System","HPO_Feature_Type__c":"Symptom"}},{"Provided_By__c":"ORPHA:394","HPO_Frequency__c":"Occasional (5-29%)","Feature__r":{"HPO_Description__c":"Elevations of the levels of SGOT and SGPT in the serum. SGOT (serum glutamic oxaloacetic transaminase) and SGPT (serum glutamic pyruvic transaminase) are transaminases primarily found in the liver and heart and are released into the bloodstream as the result of liver or heart damage. SGOT and SGPT are used clinically mainly as markers of liver damage.","HPO_Feature_URL__c":"https://hpo.jax.org/browse/term/HP:0002910","HPO_Synonym__c":"Abnormal liver enzymes; Abnormal liver function; Abnormal liver function tests; Elevated circulating hepatic transaminase activity; Elevated liver enzymes; Elevated serum transaminases; Elevated transaminases; High liver enzymes; Increased liver enzymes; Increased liver function tests; Increased transaminases; Raised liver enzymes; Subclinical abnormal liver function tests","HPO_Name__c":"Elevated circulating hepatic transaminase concentration","HPO_Feature_Type__c":"Lab"}},{"Provided_By__c":"ORPHA:394","HPO_Frequency__c":"Occasional (5-29%)","Feature__r":{"HPO_Description__c":"The presence of inflammation in the pancreas.","HPO_Feature_URL__c":"https://hpo.jax.org/browse/term/HP:0001733","HPO_Synonym__c":"Pancreatic inflammation","HPO_Name__c":"Pancreatitis","Feature_System__c":"Immune System; Digestive System","HPO_Feature_Type__c":"Symptom"}},{"Provided_By__c":"ORPHA:394","HPO_Frequency__c":"Occasional (5-29%)","Feature__r":{"HPO_Description__c":"An erythematous (red), flat facial rash that affects the skin in the malar area (over the cheekbones) and extends over the bridge of the nose.","HPO_Feature_URL__c":"https://hpo.jax.org/browse/term/HP:0025300","HPO_Synonym__c":"Butterfly rash; Cheekbone rash","HPO_Name__c":"Malar rash","Feature_System__c":"Skin System; Immune System","HPO_Feature_Type__c":"Symptom"}},{"Provided_By__c":"ORPHA:394","HPO_Frequency__c":"Occasional (5-29%)","Feature__r":{"HPO_Description__c":"Height of the palate more than 2 SD above the mean (objective) or palatal height at the level of the first permanent molar more than twice the height of the teeth (subjective).","HPO_Feature_URL__c":"https://hpo.jax.org/browse/term/HP:0000218","HPO_Synonym__c":"Elevated palate; High arched palate; High palate; High, arched palate; High-arched palate; Increased palatal height; Palate high-arched; Palate, high-arched","HPO_Name__c":"High palate","HPO_Feature_Type__c":"Symptom"}},{"Provided_By__c":"ORPHA:394","HPO_Frequency__c":"Occasional (5-29%)","Feature__r":{"HPO_Description__c":"A neurological condition related to lesions of the basal ganglia leading to typical abnormalities including akinesia (inability to initiate changes in activity and perform volitional movements rapidly and easily), muscular rigidity (continuous contraction of muscles with constant resistance to passive movement), chorea (widespread arrhythmic movements of a forcible, rapid, jerky, and restless nature), athetosis (inability to sustain the muscles of the fingers, toes, or other group of muscles in a fixed position), and akathisia (inability to remain motionless).","HPO_Feature_URL__c":"https://hpo.jax.org/browse/term/HP:0002071","HPO_Synonym__c":"Extrapyramidal dysfunction; Extrapyramidal signs; Extrapyramidal symptoms; Extrapyramidal syndrome; Extrapyramidal tract signs","HPO_Name__c":"Abnormality of extrapyramidal motor function","Feature_System__c":"Nervous System","HPO_Feature_Type__c":"Symptom"}},{"Provided_By__c":"ORPHA:394","HPO_Frequency__c":"Occasional (5-29%)","Feature__r":{"HPO_Description__c":"Hemorrhage occurring within the skull.","HPO_Feature_URL__c":"https://hpo.jax.org/browse/term/HP:0002170","HPO_Synonym__c":"Bleeding within the skull","HPO_Name__c":"Intracranial hemorrhage","Feature_System__c":"Nervous System; Cardiovascular System; Blood and Blood-Forming Tissue","HPO_Feature_Type__c":"Symptom"}},{"Provided_By__c":"ORPHA:394","HPO_Frequency__c":"Occasional (5-29%)","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:394","HPO_Frequency__c":"Occasional (5-29%)","Feature__r":{"HPO_Description__c":"Separation of the inner layers of the retina (neural retina) from the pigment epithelium.","HPO_Feature_URL__c":"https://hpo.jax.org/browse/term/HP:0000541","HPO_Synonym__c":"Detached retina; Retinal detachment","HPO_Name__c":"Retinal detachment","HPO_Feature_Type__c":"Symptom"}},{"Provided_By__c":"ORPHA:394","HPO_Frequency__c":"Occasional (5-29%)","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:394","HPO_Frequency__c":"Occasional (5-29%)","Feature__r":{"HPO_Description__c":"Hemorrhage affecting the gastrointestinal tract.","HPO_Feature_URL__c":"https://hpo.jax.org/browse/term/HP:0002239","HPO_Synonym__c":"Gastrointestinal bleeding; GI hemorrhage","HPO_Name__c":"Gastrointestinal hemorrhage","Feature_System__c":"Cardiovascular System; Digestive System; Blood and Blood-Forming Tissue","HPO_Feature_Type__c":"Symptom"}},{"Provided_By__c":"ORPHA:394","HPO_Frequency__c":"Occasional (5-29%)","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:394","HPO_Frequency__c":"Frequent (30-79%)","Feature__r":{"HPO_Description__c":"A deformity of the chest caused by overgrowth of the ribs and characterized by protrusion of the sternum.","HPO_Feature_URL__c":"https://hpo.jax.org/browse/term/HP:0000768","HPO_Synonym__c":"Pigeon chest","HPO_Name__c":"Pectus carinatum","Feature_System__c":"Musculoskeletal System","HPO_Feature_Type__c":"Symptom"}},{"Provided_By__c":"ORPHA:394","HPO_Frequency__c":"Very frequent (80-99%)","Feature__r":{"HPO_Description__c":"Dislocation or malposition of the crystalline lens of the eye. A partial displacement (or dislocation) of the lens is described as a subluxation of the lens, while a complete displacement is termed luxation of the lens. A complete displacement occurs if the lens is completely outside the patellar fossa of the lens, either in the anterior chamber, in the vitreous, or directly on the retina. If the lens is partially displaced but still contained within the lens space, then it is termed subluxation.","HPO_Feature_URL__c":"https://hpo.jax.org/browse/term/HP:0001083","HPO_Synonym__c":"Abnormality of lens position; Lens dislocation","HPO_Name__c":"Ectopia lentis","HPO_Feature_Type__c":"Symptom"}},{"Provided_By__c":"ORPHA:394","HPO_Frequency__c":"Occasional (5-29%)","Feature__r":{"HPO_Description__c":"An abnormally increased muscular tone that causes fixed abnormal postures. There is a slow, intermittent twisting motion that leads to exaggerated turning and posture of the extremities and trunk.","HPO_Feature_URL__c":"https://hpo.jax.org/browse/term/HP:0001332","HPO_Synonym__c":"Dystonic movements","HPO_Name__c":"Dystonia","Feature_System__c":"Nervous System","HPO_Feature_Type__c":"Symptom"}},{"Provided_By__c":"ORPHA:394","HPO_Frequency__c":"Frequent (30-79%)","Feature__r":{"HPO_Description__c":"Restriction of arterial blood supply to the brain associated with insufficient oxygenation to support the metabolic requirements of the tissue.","HPO_Feature_URL__c":"https://hpo.jax.org/browse/term/HP:0002637","HPO_Synonym__c":"Brain ischemia; Cerebrovascular ischemia; Disruption of blood oxygen supply to brain","HPO_Name__c":"Cerebral ischemia","Feature_System__c":"Cardiovascular System","HPO_Feature_Type__c":"Symptom"}},{"Provided_By__c":"ORPHA:394","HPO_Frequency__c":"Occasional (5-29%)","Feature__r":{"HPO_Description__c":"A cataract is an opacity or clouding that develops in the crystalline lens of the eye or in its capsule.","HPO_Feature_URL__c":"https://hpo.jax.org/browse/term/HP:0000518","HPO_Synonym__c":"Cataracts; Clouding of the lens of the eye; Cloudy lens; Lens opacities; Lens opacity","HPO_Name__c":"Cataract","HPO_Feature_Type__c":"Symptom"}},{"Provided_By__c":"ORPHA:394","HPO_Frequency__c":"Occasional (5-29%)","Feature__r":{"HPO_Description__c":"Characteristic neurologic anomaly resulting from degeneration of dopamine-generating cells in the substantia nigra, a region of the midbrain, characterized clinically by shaking, rigidity, slowness of movement and difficulty with walking and gait.","HPO_Feature_URL__c":"https://hpo.jax.org/browse/term/HP:0001300","HPO_Name__c":"Parkinsonism","Feature_System__c":"Nervous System","HPO_Feature_Type__c":"Symptom"}},{"Provided_By__c":"ORPHA:394","HPO_Frequency__c":"Very frequent (80-99%)","Feature__r":{"HPO_Description__c":"Abnormally long and slender fingers (spider fingers).","HPO_Feature_URL__c":"https://hpo.jax.org/browse/term/HP:0001166","HPO_Synonym__c":"Long slender fingers; Long, slender fingers; Spider fingers","HPO_Name__c":"Arachnodactyly","Feature_System__c":"Musculoskeletal System","HPO_Feature_Type__c":"Symptom"}},{"Provided_By__c":"ORPHA:394","HPO_Frequency__c":"Occasional (5-29%)","Feature__r":{"HPO_Description__c":"Raised, well-circumscribed areas of erythema and edema involving the dermis and epidermis. Urticaria is intensely pruritic, and blanches completely with pressure.","HPO_Feature_URL__c":"https://hpo.jax.org/browse/term/HP:0001025","HPO_Synonym__c":"Hives","HPO_Name__c":"Urticaria","Feature_System__c":"Skin System; Cardiovascular System","HPO_Feature_Type__c":"Symptom"}},{"Provided_By__c":"ORPHA:394","HPO_Frequency__c":"Frequent (30-79%)","Feature__r":{"HPO_Description__c":"An anomalous configuration of blood vessels that shunts arterial blood directly into veins without passing through the capillaries.","HPO_Feature_URL__c":"https://hpo.jax.org/browse/term/HP:0100026","HPO_Name__c":"Arteriovenous malformation","Feature_System__c":"Cardiovascular System","HPO_Feature_Type__c":"Symptom"}},{"Provided_By__c":"ORPHA:394","HPO_Frequency__c":"Occasional (5-29%)","Feature__r":{"HPO_Description__c":"Abnormally increased size of the liver.","HPO_Feature_URL__c":"https://hpo.jax.org/browse/term/HP:0002240","HPO_Synonym__c":"Enlarged liver","HPO_Name__c":"Hepatomegaly","Feature_System__c":"Digestive System","HPO_Feature_Type__c":"Symptom"}},{"Provided_By__c":"ORPHA:394","HPO_Frequency__c":"Occasional (5-29%)","Feature__r":{"HPO_Description__c":"Persistent deficits in social interaction and communication and interaction as well as a markedly restricted repertoire of activity and interest as well as repetitive patterns of behavior.","HPO_Feature_URL__c":"https://hpo.jax.org/browse/term/HP:0000729","HPO_Synonym__c":"ASD; Pervasive developmental disorder","HPO_Name__c":"Autistic behavior","Feature_System__c":"Nervous System","HPO_Feature_Type__c":"Symptom"}},{"Provided_By__c":"ORPHA:394","HPO_Frequency__c":"Very frequent (80-99%)","Feature__r":{"HPO_Description__c":"The repeated occurrence of bone fractures (implying an abnormally increased tendency for fracture).","HPO_Feature_URL__c":"https://hpo.jax.org/browse/term/HP:0002757","HPO_Synonym__c":"Frequent fractures; Increased fracture rate; Increased fractures; Multiple fractures; Multiple spontaneous fractures; Recurrent fractures; Varying degree of multiple fractures","HPO_Name__c":"Recurrent fractures","Feature_System__c":"Musculoskeletal System","HPO_Feature_Type__c":"Symptom"}},{"Provided_By__c":"ORPHA:394","HPO_Frequency__c":"Occasional (5-29%)","Feature__r":{"HPO_Description__c":"Livedo reticularis is characterized by the presence of a bluish purple, mottled or netlike pattern in unbroken circles on the skin. Exposure to cold environments usually intensifies the vascular pattern. Presumably, the condition results from slow or stagnant blood flow, vessel-wall pathology, and decreased oxygen tension.","HPO_Feature_URL__c":"https://hpo.jax.org/browse/term/HP:0033505","HPO_Name__c":"Livedo reticularis","Feature_System__c":"Skin System; Cardiovascular System","HPO_Feature_Type__c":"Symptom"}},{"Provided_By__c":"ORPHA:394","HPO_Frequency__c":"Occasional (5-29%)","Feature__r":{"HPO_Description__c":"Extreme dilation of the submucusoal veins in the lower portion of the esophagus.","HPO_Feature_URL__c":"https://hpo.jax.org/browse/term/HP:0002040","HPO_Synonym__c":"Enlarged vein in esophagus","HPO_Name__c":"Esophageal varix","Feature_System__c":"Digestive System","HPO_Feature_Type__c":"Symptom"}},{"Provided_By__c":"ORPHA:394","HPO_Frequency__c":"Frequent (30-79%)","Feature__r":{"HPO_Description__c":"The presence of an abnormal lateral curvature of the spine.","HPO_Feature_URL__c":"https://hpo.jax.org/browse/term/HP:0002650","HPO_Name__c":"Scoliosis","Feature_System__c":"Musculoskeletal System","HPO_Feature_Type__c":"Symptom"}},{"Provided_By__c":"ORPHA:394","HPO_Frequency__c":"Frequent (30-79%)","Feature__r":{"HPO_Description__c":"Exaggerated anterior convexity of the thoracic vertebral column.","HPO_Feature_URL__c":"https://hpo.jax.org/browse/term/HP:0002808","HPO_Synonym__c":"Gibbus deformity; Hunched back; Hyperkyphosis; Round back","HPO_Name__c":"Kyphosis","Feature_System__c":"Musculoskeletal System","HPO_Feature_Type__c":"Symptom"}},{"Provided_By__c":"ORPHA:394","HPO_Frequency__c":"Frequent (30-79%)","Feature__r":{"HPO_Description__c":"A defect of the chest wall characterized by a depression of the sternum, giving the chest (\\\"pectus\\\") a caved-in (\\\"excavatum\\\") appearance.","HPO_Feature_URL__c":"https://hpo.jax.org/browse/term/HP:0000767","HPO_Synonym__c":"Funnel chest","HPO_Name__c":"Pectus excavatum","Feature_System__c":"Musculoskeletal System","HPO_Feature_Type__c":"Symptom"}},{"Provided_By__c":"ORPHA:394","HPO_Frequency__c":"Occasional (5-29%)","Feature__r":{"HPO_Description__c":"This term refers to an abnormally increased susceptibility to bruising (purpura, petechiae, or ecchymoses).","HPO_Feature_URL__c":"https://hpo.jax.org/browse/term/HP:0001933","HPO_Synonym__c":"Bleeding below the skin","HPO_Name__c":"Subcutaneous hemorrhage","Feature_System__c":"Skin System; Cardiovascular System; Blood and Blood-Forming Tissue","HPO_Feature_Type__c":"Symptom"}},{"Provided_By__c":"ORPHA:394","HPO_Frequency__c":"Occasional (5-29%)","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:394","HPO_Frequency__c":"Frequent (30-79%)","Feature__r":{"HPO_Description__c":"An increase in height of the medial longitudinal arch of the foot that does not flatten on weight bearing (i.e., a distinctly hollow form of the sole of the foot when it is bearing weight).","HPO_Feature_URL__c":"https://hpo.jax.org/browse/term/HP:0001761","HPO_Synonym__c":"Cavus foot; High-arched foot","HPO_Name__c":"Pes cavus","HPO_Feature_Type__c":"Symptom"}},{"Provided_By__c":"ORPHA:394","HPO_Frequency__c":"Occasional (5-29%)","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:394","HPO_Frequency__c":"Very frequent (80-99%)","Feature__r":{"HPO_Description__c":"Abnormality of an amino acid metabolic process.","HPO_Feature_URL__c":"https://hpo.jax.org/browse/term/HP:0004337","HPO_Name__c":"Abnormality of amino acid metabolism","HPO_Feature_Type__c":"Lab"}},{"Provided_By__c":"ORPHA:394","HPO_Frequency__c":"Very frequent (80-99%)","Feature__r":{"HPO_Description__c":"The term intellectual disability or intellectual developmental disorder is used to describe significantly sub-average intellectual and adaptive functioning based on clinical assessment and as measured by individually administered, appropriately normed, standardized and validated tests of intellectual functioning and adaptive behavior, with onset during the developmental period from infancy through adolescence.","HPO_Feature_URL__c":"https://hpo.jax.org/browse/term/HP:0001249","HPO_Synonym__c":"Intellectual disability; Mental deficiency; Mental retardation; Mental retardation, nonspecific; Mental-retardation; Nonprogressive intellectual disability; Nonprogressive mental retardation","HPO_Name__c":"Intellectual disability","Feature_System__c":"Nervous System","HPO_Feature_Type__c":"Symptom"}},{"Provided_By__c":"ORPHA:394","HPO_Frequency__c":"Frequent (30-79%)","Feature__r":{"HPO_Description__c":"The formation of a blood clot inside an artery.","HPO_Feature_URL__c":"https://hpo.jax.org/browse/term/HP:0004420","HPO_Synonym__c":"Blood clot in artery","HPO_Name__c":"Arterial thrombosis","Feature_System__c":"Blood and Blood-Forming Tissue","HPO_Feature_Type__c":"Symptom"}},{"Provided_By__c":"ORPHA:394","HPO_Frequency__c":"Occasional (5-29%)","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:394","HPO_Frequency__c":"Occasional (5-29%)","Feature__r":{"HPO_Feature_URL__c":"https://hpo.jax.org/browse/term/HP:0100790","HPO_Name__c":"Hernia","Feature_System__c":"Musculoskeletal System","HPO_Feature_Type__c":"Symptom"}},{"Provided_By__c":"ORPHA:394","HPO_Frequency__c":"Occasional (5-29%)","Feature__r":{"HPO_Description__c":"A misalignment of the eyes so that the visual axes deviate from bifoveal fixation. The classification of strabismus may be based on a number of features including the relative position of the eyes, whether the deviation is latent or manifest, intermittent or constant, concomitant or otherwise and according to the age of onset and the relevance of any associated refractive error.","HPO_Feature_URL__c":"https://hpo.jax.org/browse/term/HP:0000486","HPO_Synonym__c":"Cross-eyed; Squint; Squint eyes","HPO_Name__c":"Strabismus","HPO_Feature_Type__c":"Symptom"}},{"Provided_By__c":"ORPHA:394","HPO_Frequency__c":"Frequent (30-79%)","Feature__r":{"HPO_Description__c":"Formation of a blood clot (thrombus) inside a vein, causing the obstruction of blood flow.","HPO_Feature_URL__c":"https://hpo.jax.org/browse/term/HP:0004936","HPO_Synonym__c":"Blood clot in vein","HPO_Name__c":"Venous thrombosis","Feature_System__c":"Blood and Blood-Forming Tissue","HPO_Feature_Type__c":"Symptom"}},{"Provided_By__c":"ORPHA:394","HPO_Frequency__c":"Frequent (30-79%)","Feature__r":{"HPO_Description__c":"An abnormality of refraction characterized by the ability to see objects nearby clearly, while objects in the distance appear blurry.","HPO_Feature_URL__c":"https://hpo.jax.org/browse/term/HP:0000545","HPO_Synonym__c":"Close sighted; Near sighted; Near sightedness; Nearsightedness","HPO_Name__c":"Myopia","HPO_Feature_Type__c":"Symptom"}},{"Provided_By__c":"ORPHA:394","HPO_Frequency__c":"Very frequent (80-99%)","Feature__r":{"HPO_Description__c":"An increased concentration of homocystine in the blood.","HPO_Feature_URL__c":"https://hpo.jax.org/browse/term/HP:0002160","HPO_Synonym__c":"Elevated blood homocystine; Homocystinemia","HPO_Name__c":"Hyperhomocystinemia","HPO_Feature_Type__c":"Lab"}},{"Provided_By__c":"ORPHA:394","HPO_Frequency__c":"Very frequent (80-99%)","Feature__r":{"HPO_Description__c":"Osteoporosis is a systemic skeletal disease characterized by low bone density and microarchitectural deterioration of bone tissue with a consequent increase in bone fragility. According to the WHO criteria, osteoporosis is defined as a BMD that lies 2.5 standard deviations or more below the average value for young healthy adults (a T-score below -2.5 SD).","HPO_Feature_URL__c":"https://hpo.jax.org/browse/term/HP:0000939","HPO_Name__c":"Osteoporosis","Feature_System__c":"Musculoskeletal System","HPO_Feature_Type__c":"Symptom"}},{"Provided_By__c":"ORPHA:394","HPO_Frequency__c":"Occasional (5-29%)","Feature__r":{"HPO_Description__c":"Any deviation from the normal pigmentation of the retina.","HPO_Feature_URL__c":"https://hpo.jax.org/browse/term/HP:0007703","HPO_Synonym__c":"Abnormality of retinal pigment epithelium; Abnormality of retinal pigmentation; Abnormality of RPE; Retinal pigmentary anomaly","HPO_Name__c":"Abnormal retinal pigmentation","HPO_Feature_Type__c":"Symptom"}},{"Provided_By__c":"ORPHA:394","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:394","HPO_Frequency__c":"Frequent (30-79%)","Feature__r":{"HPO_Description__c":"An embolus (that is, an abnormal particle circulating in the blood) located in the pulmonary artery and thereby blocking blood circulation to the lung. Usually the embolus is a blood clot that has developed in an extremity (for instance, a deep venous thrombosis), detached, and traveled through the circulation before becoming trapped in the pulmonary artery.","HPO_Feature_URL__c":"https://hpo.jax.org/browse/term/HP:0002204","HPO_Synonym__c":"Blood clot in artery of lung","HPO_Name__c":"Pulmonary embolism","Feature_System__c":"Cardiovascular System; Respiratory system","HPO_Feature_Type__c":"Symptom"}},{"Provided_By__c":"ORPHA:394","HPO_Frequency__c":"Occasional (5-29%)","Feature__r":{"HPO_Description__c":"An abnormality of the cerebral white matter.","HPO_Feature_URL__c":"https://hpo.jax.org/browse/term/HP:0002500","HPO_Synonym__c":"Abnormality of subcortical white matter; Abnormality of the cerebral white matter; Cerebral white matter abnormalities; Leukoaraiosis; White matter abnormalities; White matter alterations","HPO_Name__c":"Abnormal cerebral white matter morphology","Feature_System__c":"Nervous System","HPO_Feature_Type__c":"Symptom"}},{"Provided_By__c":"ORPHA:394","HPO_Frequency__c":"Occasional (5-29%)","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 severe or complete loss of strength, whereas hemiparesis refers to a relatively mild loss of strength.","HPO_Feature_URL__c":"https://hpo.jax.org/browse/term/HP:0004374","HPO_Synonym__c":"Paralysis or weakness of one side of body","HPO_Name__c":"Hemiplegia/hemiparesis","Feature_System__c":"Nervous System","HPO_Feature_Type__c":"Symptom"}},{"Provided_By__c":"ORPHA:394","HPO_Frequency__c":"Occasional (5-29%)","Feature__r":{"HPO_Description__c":"The presence of one or more obsessive-compulsive personality traits. Obsessions refer to persistent intrusive thoughts, and compulsions to intrusive behaviors, which the affected person experiences as involuntary, senseless, or repugnant.","HPO_Feature_URL__c":"https://hpo.jax.org/browse/term/HP:0008770","HPO_Synonym__c":"Obsessive-compulsive trait; Obsessive-compulsive traits","HPO_Name__c":"Obsessive-compulsive trait","Feature_System__c":"Nervous System","HPO_Feature_Type__c":"Symptom"}},{"Provided_By__c":"ORPHA:394","HPO_Frequency__c":"Occasional (5-29%)","Feature__r":{"HPO_Description__c":"Glaucoma refers loss of retinal ganglion cells in a characteristic pattern of optic neuropathy usually associated with increased intraocular pressure.","HPO_Feature_URL__c":"https://hpo.jax.org/browse/term/HP:0000501","HPO_Name__c":"Glaucoma","HPO_Feature_Type__c":"Symptom"}},{"Provided_By__c":"ORPHA:394","HPO_Frequency__c":"Frequent (30-79%)","Feature__r":{"HPO_Description__c":"Reduced visual acuity that is uncorrectable by lenses in the absence of detectable anatomic defects in the eye or visual pathways.","HPO_Feature_URL__c":"https://hpo.jax.org/browse/term/HP:0000646","HPO_Synonym__c":"Lazy eye; Wandering eye; Wandering eyes","HPO_Name__c":"Amblyopia","HPO_Feature_Type__c":"Symptom"}},{"Provided_By__c":"ORPHA:394","HPO_Frequency__c":"Occasional (5-29%)","Feature__r":{"HPO_Description__c":"An intracranial thrombosis of the venous sinuses. These typically present with headache, seizures or venous stroke secondary to raised cerebral venous pressure. Cerebral venous sinus thromboses usually affect larger areas of brain parenchyma than those affected by cerebral vein thromboses.","HPO_Feature_URL__c":"https://hpo.jax.org/browse/term/HP:0033724","HPO_Name__c":"Cerebral venous sinus thrombosis","Feature_System__c":"Nervous System; Cardiovascular System; Blood and Blood-Forming Tissue","HPO_Feature_Type__c":"Symptom"}},{"Provided_By__c":"ORPHA:394","HPO_Frequency__c":"Very frequent (80-99%)","Feature__r":{"HPO_Description__c":"Changes in alignment of teeth in the dental arch","HPO_Feature_URL__c":"https://hpo.jax.org/browse/term/HP:0000678","HPO_Synonym__c":"Crowded teeth; Dental crowding; Dental overcrowding; Overcrowding of teeth","HPO_Name__c":"Dental crowding","HPO_Feature_Type__c":"Symptom"}},{"Provided_By__c":"ORPHA:394","HPO_Frequency__c":"Frequent (30-79%)","Feature__r":{"HPO_Description__c":"Joint stiffness is a perceived sensation of tightness in a joint or joints when attempting to move them after a period of inactivity. Joint stiffness typically subsides over time.","HPO_Feature_URL__c":"https://hpo.jax.org/browse/term/HP:0001387","HPO_Synonym__c":"Joint stiffness; Stiff joint; Stiff joints","HPO_Name__c":"Joint stiffness","Feature_System__c":"Musculoskeletal System","HPO_Feature_Type__c":"Symptom"}},{"Provided_By__c":"ORPHA:394","HPO_Frequency__c":"Occasional (5-29%)","Feature__r":{"HPO_Description__c":"Neurodevelopmental delay (NDD) refers to delays in the maturation of the brain and central nervous system; infants and young children with NDD may experience delays in the development of one or more skills including gross motor abilities, fine-motor coordination, language abilities and ability to solve increasingly complex problems.","HPO_Feature_URL__c":"https://hpo.jax.org/browse/term/HP:0012758","HPO_Synonym__c":"NDD","HPO_Name__c":"Neurodevelopmental delay","Feature_System__c":"Nervous System","HPO_Feature_Type__c":"Symptom"}},{"Provided_By__c":"ORPHA:394","HPO_Frequency__c":"Very frequent (80-99%)","Feature__r":{"HPO_Description__c":"A tall and slim body build with increased arm span to height ratio (>1.05) and a reduced upper-to-lower segment ratio (<0.85), i.e., unusually long arms and legs. The extremities as well as the hands and feet are unusually slim.","HPO_Feature_URL__c":"https://hpo.jax.org/browse/term/HP:0001519","HPO_Synonym__c":"Dolichostenomelia; Marfanoid body habitus; Marfanoid habitus; Reduced upper-lower segment ratio","HPO_Name__c":"Disproportionate tall stature","HPO_Feature_Type__c":"Symptom"}},{"Provided_By__c":"ORPHA:394","HPO_Frequency__c":"Frequent (30-79%)","Feature__r":{"HPO_Description__c":"The legs angle inward, such that the knees are close together and the ankles far apart.","HPO_Feature_URL__c":"https://hpo.jax.org/browse/term/HP:0002857","HPO_Synonym__c":"Genu valga; Genu valgus; Genua valga; Knee joint valgus deformity; Knock knees","HPO_Name__c":"Genu valgum","Feature_System__c":"Musculoskeletal System","HPO_Feature_Type__c":"Symptom"}},{"Provided_By__c":"ORPHA:394","HPO_Frequency__c":"Frequent (30-79%)","Feature__r":{"HPO_Description__c":"Decreased number of hairs per unit area of skin of the scalp.","HPO_Feature_URL__c":"https://hpo.jax.org/browse/term/HP:0002209","HPO_Synonym__c":"Decreased number of scalp follicles; Hypotrichosis on scalp; Reduced amount of scalp hair; Reduced/lack of hair on scalp; Reduction in the number of scalp follicles; Scalp hypotrichosis; Sparse scalp hair; Thinning scalp hair","HPO_Name__c":"Sparse scalp hair","Feature_System__c":"Skin System","HPO_Feature_Type__c":"Symptom"}}],"tags":{"Cause":["Genetics","Inborn Errors of Metabolism"],"Disease Category":["Genetics","Neurology","Inborn Errors of Metabolism","Congenital Abnormality"],"Specialist":["Genetics","Neurology","Ophthalmology","Epilepsy","Anterior segment of Eye","Neurodevelopmental disabilities","Pediatrics"],"Account":["Epilepsy","Glaucoma"]},"synonyms":["cbs deficiency"," cystathionine beta-synthase deficiency"," deficiency of beta-thionase"," deficiency of methylcysteine synthase"," deficiency of serine sulfhydrase"," homocystinuria due to cbs deficiency"," homocystinuria due to cystathionine beta-synthase deficiency"," homocystinuria with or without response to pyridoxine"," homocystinuria, b6-responsive and nonresponsive types"," thrombosis, hyperhomocysteinemic"]}