{"Name":"Homocystinuria without methylmalonic aciduria","DiseaseID__c":"GARD:0016537","id":16537,"encodedName":"homocystinuria-without-methylmalonic-aciduria","IsDeleted":false,"Disease_Name_Full__c":"Homocystinuria without methylmalonic aciduria","Xref_IDs__c":"721225009; C4303479; MEDGEN:929148; MONDO:0018964; OMIMPS:236270; ORPHA:622","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":0,"World_Estimate__c":"1 to 8,000","No_of_HRSA_records__c":0,"Evidence_Based_Score__c":0,"No_of_Disease_Descriptions__c":1,"Disease_Characteristics_Score__c":7,"No_of_Age_at_Onset__c":1,"Description_Source__c":"MONDO:0018964","Disease_Description__c":"Homocystinuria without methylmalonic aciduria is an inborn error of vitamin B12 (cobalamin) metabolism characterized by megaloblastic anemia, encephalopathy and, sometimes, developmental delay, and associated with homocystinuria and hyperhomocysteinemia. There are three types of homocystinuria without methylmalonic aciduria; <i>cblE, cblG</i> and <i>cblD-</i>variant 1 (<i>cblD</i>v1).","GARD_Name__c":"Homocystinuria without methylmalonic aciduria","GARD_Synonym__c":"functional methionine synthase deficiency; methylcobalamin deficiency","Curated_Disease_Description_Source__c":"MONDO:0018964","Curated_Disease_Description__c":"Homocystinuria without methylmalonic aciduria is an inborn error of vitamin B12 (cobalamin) metabolism characterized by megaloblastic anemia, encephalopathy and, sometimes, developmental delay, and associated with homocystinuria and hyperhomocysteinemia. There are three types of homocystinuria without methylmalonic aciduria; cblE, cblG and cblD-variant 1 (cblDv1).","Curated_USA_Estimate_Source__c":null,"Curated_USA_Estimate__c":"1,000","Age_at_Onset_Snippet_Text__c":"at any time in life","SourceID__c":"ORPHA:622","Deprecated__c":"No","Disease_Concept_Type__c":"Rare Disease Grouping","MONDO_ID__c":"MONDO:0018964","ORPHANET_ID__c":"ORPHA:622","Replaced_By_ID__c":null,"Display_Spanish_Disease_Name__c":"Homocistinuria sin aciduria metilmalónica","Spanish_Description_Source__c":"ORPHA:622","Spanish_Description__c":"La homocistinuria sin aciduria metilmalónica es un error congénito del metabolismo de la vitamina B12 (cobalamina) caracterizado por anemia megaloblástica, encefalopatía y, en ocasiones, retraso del desarrollo, asociado con homocistinuria e hiperhomocisteinemia. Existen tres tipos de homocistinuria sin aciduria metilmalónica; <i>cblE, cblG</i> y <i>cblD-</i>variante 1 (<i>cblD</i>v1).","Spanish_Disease_Name__c":"homocistinuria sin aciduria metilmalónica","Spanish_GARD_Synonym__c":"deficiencia de metilcobalamina; deficiencia funcional de metionina sintasa","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":"Homocystinuria without methylmalonic aciduria is an inborn error of vitamin B12 (cobalamin) metabolism characterized by megaloblastic anemia, encephalopathy and, sometimes, developmental delay, and associated with homocystinuria and hyperhomocysteinemia. There are three types of homocystinuria without methylmalonic aciduria; cblE, cblG and cblD-variant 1 (cblDv1).","Curated_Disease_Description_Source__c":"MONDO:0018964","GARD_Synonym__c":"functional methionine synthase deficiency; methylcobalamin deficiency","Name":"Homocystinuria without methylmalonic aciduria","Curated_USA_Estimate__c":"1,000","estimateUsa":"1,000"}],"Organization_Supported_Diseases__c":[{"Account_Name__c":"HCU Network America","Website__c":"https://hcunetworkamerica.org/"},{"Account_Name__c":"Child Neurology Foundation","Website__c":"https://www.childneurologyfoundation.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":"Hematology","Tag_Category__c":"Disease Category;Specialist","category_description":"Blood diseases affect the blood or blood-forming organs, including red blood cells, white blood cells, platelets, plasma, and bone marrow.","curated_tag_name":"Blood 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":"Pediatrics","Tag_Category__c":"Specialist"}],"Age_At_Onset__c":[{"Age_At_Onset__c":"All ages","Provided_By__c":"ORPHA:622"}],"External_Identifier_Disease__c":[{"URL__c":"https://www.ncbi.nlm.nih.gov/books/NBK1328","Source__c":"Gene Review","Xref__c":"NBK1328"},{"URL__c":"https://www.ncbi.nlm.nih.gov/books/NBK1231","Source__c":"Gene Review","Xref__c":"NBK1231"},{"URL__c":"https://www.orpha.net/en/disease/detail/622","Source__c":"C4303479; MONDO:0018964; ORPHA:622","Xref__c":"ORPHA:622"},{"URL__c":"https://uts.nlm.nih.gov/uts/umls/concept/C4303479","Source__c":"C4303479","Xref__c":"C4303479"},{"URL__c":"https://www.ncbi.nlm.nih.gov/medgen/?term=929148","Source__c":"C4303479","Xref__c":"MEDGEN:929148"},{"URL__c":"https://browser.ihtsdotools.org/?perspective=full&conceptId1=721225009","Source__c":"C4303479; MONDO:0018964","Xref__c":"721225009"},{"URL__c":"http://purl.obolibrary.org/obo/MONDO_0018964","Source__c":"GARD:0016537","Xref__c":"MONDO:0018964"},{"URL__c":"https://www.omim.org/phenotypicSeries/PS236270","Source__c":"MONDO:0018964","Xref__c":"OMIMPS:236270"}],"Inheritance__c":["Autosomal recessive"],"GARD_Disease_Feature__c":[{"Provided_By__c":"ORPHA:622","HPO_Frequency__c":"Frequent (30-79%)","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:622","HPO_Frequency__c":"Frequent (30-79%)","Feature__r":{"HPO_Description__c":"Rhythmic, involuntary oscillations of one or both eyes related to abnormality in fixation, conjugate gaze, or vestibular mechanisms.","HPO_Feature_URL__c":"https://hpo.jax.org/browse/term/HP:0000639","HPO_Synonym__c":"Involuntary, rapid, rhythmic eye movements","HPO_Name__c":"Nystagmus","HPO_Feature_Type__c":"Symptom"}},{"Provided_By__c":"ORPHA:622","HPO_Frequency__c":"Very frequent (80-99%)","Feature__r":{"HPO_Description__c":"Abnormal increased number of megaloblasts in the bone marrow.","HPO_Feature_URL__c":"https://hpo.jax.org/browse/term/HP:0001980","HPO_Name__c":"Megaloblastic bone marrow","Feature_System__c":"Blood and Blood-Forming Tissue","HPO_Feature_Type__c":"Symptom"}},{"Provided_By__c":"ORPHA:622","HPO_Frequency__c":"Occasional (5-29%)","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:622","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:622","HPO_Frequency__c":"Occasional (5-29%)","Feature__r":{"HPO_Description__c":"Visual impairment (or vision impairment) is vision loss (of a person) to such a degree as to qualify as an additional support need through a significant limitation of visual capability resulting from either disease, trauma, or congenital or degenerative conditions that cannot be corrected by conventional means, such as refractive correction, medication, or surgery.","HPO_Feature_URL__c":"https://hpo.jax.org/browse/term/HP:0000505","HPO_Synonym__c":"Impaired vision; Loss of eyesight; Poor vision; Visual impairment","HPO_Name__c":"Visual impairment","HPO_Feature_Type__c":"Symptom"}},{"Provided_By__c":"ORPHA:622","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":"ORPHA:622","HPO_Frequency__c":"Frequent (30-79%)","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:622","HPO_Frequency__c":"Occasional (5-29%)","Feature__r":{"HPO_Description__c":"A state of fatigue, either physical or mental slowness and sluggishness, with difficulties in initiating or performing simple tasks. Distinguished from apathy which implies indifference and a lack of desire or interest in the task. A person with lethargy may have the desire, but not the energy to engage in personal or socially relevant tasks.","HPO_Feature_URL__c":"https://hpo.jax.org/browse/term/HP:0001254","HPO_Synonym__c":"Dullness; Inaction; Inactivity; Languor; Lethargy; Slowness; Torpor","HPO_Name__c":"Lethargy","Feature_System__c":"Nervous System","HPO_Feature_Type__c":"Symptom"}},{"Provided_By__c":"ORPHA:622","HPO_Frequency__c":"Occasional (5-29%)","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:622","HPO_Frequency__c":"Occasional (5-29%)","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:622","HPO_Frequency__c":"Frequent (30-79%)","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:622","HPO_Frequency__c":"Frequent (30-79%)","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"}}],"tags":{"Cause":["Genetics","Inborn Errors of Metabolism"],"Disease Category":["Genetics","Neurology","Hematology","Inborn Errors of Metabolism"],"Specialist":["Genetics","Neurology","Hematology","Pediatrics"]},"synonyms":["functional methionine synthase deficiency"," methylcobalamin deficiency"]}