{"Name":"Charcot-Marie-Tooth disease, demyelinating, type 1G","DiseaseID__c":"GARD:0017851","id":17851,"encodedName":"charcot-marie-tooth-disease-demyelinating-type-1g","IsDeleted":false,"Disease_Name_Full__c":"Charcot-Marie-Tooth disease, demyelinating, type 1G","Xref_IDs__c":"C4748940; DOID:0111560; MEDGEN:1648290; MONDO:0033135; OMIM:618279; ORPHA:476394","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":2,"Disease_Characteristics_Score__c":8,"No_of_Age_at_Onset__c":2,"Description_Source__c":"MONDO:0033135","Disease_Description__c":"A rare autosomal dominant hereditary demyelinating motor and sensory neuropathy characterized by progressive distal muscle weakness and atrophy, distal sensory impairment, and decreased or absent reflexes in the affected limbs, with an onset in the first or second decade of life. Median motor nerve conduction velocities are typically less than 38 m/s. Patients often have foot deformities. Sural nerve biopsy shows decrease in myelinated fibers, myelin abnormalities, and onion bulb formation. Fatty replacement of muscle tissue predominantly affects the anterior and lateral compartment of the lower legs.","GARD_Name__c":"Charcot-Marie-Tooth disease, demyelinating, type 1G","GARD_Synonym__c":"cmt1g; pmp2-related charcot-marie-tooth disease type 1; pmp2-related charcot-marie-tooth neuropathy type 1; pmp2-related cmt1; pmp2-related hereditary motor and sensory neuropathy type 1","Curated_Disease_Description_Source__c":"MONDO:0033135","Curated_Disease_Description__c":"A rare autosomal dominant hereditary demyelinating motor and sensory neuropathy characterized by progressive distal muscle weakness and atrophy, distal sensory impairment, and decreased or absent reflexes in the affected limbs, with an onset in the first or second decade of life. Median motor nerve conduction velocities are typically less than 38 m/s. Patients often have foot deformities. Sural nerve biopsy shows decrease in myelinated fibers, myelin abnormalities, and onion bulb formation. Fatty replacement of muscle tissue predominantly affects the anterior and lateral compartment of the lower legs.","Curated_USA_Estimate_Source__c":null,"Curated_USA_Estimate__c":"1,000","Age_at_Onset_Snippet_Text__c":"as a Child and as a Teenager","SourceID__c":"ORPHA:476394","Deprecated__c":"No","Disease_Concept_Type__c":"Rare Disease Entity","MONDO_ID__c":"MONDO:0033135","ORPHANET_ID__c":"ORPHA:476394","Replaced_By_ID__c":null,"Display_Spanish_Disease_Name__c":"Enfermedad de charcot-marie-tooth tipo 1 asociada al gen pmp2","Spanish_Description_Source__c":"ORPHA:476394","Spanish_Description__c":"Es una neuropatía desmielinizante sensitivo-motora hereditaria autosómica dominante poco frecuente, caracterizada por debilidad y atrofia muscular distal lentamente progresiva, deterioro sensitivo distal y disminución o ausencia de reflejos en las extremidades afectadas, de inicio en la primera o segunda década de la vida. La velocidad de conducción nerviosa motora media es, típicamente, inferior a 38 m/s. Con frecuencia, los pacientes presentan deformidades del pie. La biopsia del nervio sural muestra una disminución de las fibras mielinizadas, anomalías de la mielina y formaciones de ''bulbos de cebolla''. El reemplazo graso del tejido muscular afecta predominantemente al compartimento anterior y lateral de la región inferior de las piernas.","Spanish_Disease_Name__c":"enfermedad de charcot-marie-tooth tipo 1 asociada al gen pmp2","Spanish_GARD_Synonym__c":null,"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":"A rare autosomal dominant hereditary demyelinating motor and sensory neuropathy characterized by progressive distal muscle weakness and atrophy, distal sensory impairment, and decreased or absent reflexes in the affected limbs, with an onset in the first or second decade of life. Median motor nerve conduction velocities are typically less than 38 m/s. Patients often have foot deformities. Sural nerve biopsy shows decrease in myelinated fibers, myelin abnormalities, and onion bulb formation. Fatty replacement of muscle tissue predominantly affects the anterior and lateral compartment of the lower legs.","Curated_Disease_Description_Source__c":"MONDO:0033135","GARD_Synonym__c":"cmt1g; pmp2-related charcot-marie-tooth disease type 1; pmp2-related charcot-marie-tooth neuropathy type 1; pmp2-related cmt1; pmp2-related hereditary motor and sensory neuropathy type 1","Name":"Charcot-Marie-Tooth disease, demyelinating, type 1G","Curated_USA_Estimate__c":"1,000","estimateUsa":"1,000"}],"Organization_Supported_Diseases__c":[{"Account_Name__c":"CMT Research Foundation","Website__c":"https://cmtrf.org/"},{"Account_Name__c":"Muscular Dystrophy Canada","Website__c":"https://muscle.ca/"}],"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":"Peripheral Neuropathy","Tag_Category__c":"Account","curated_tag_name":"Peripheral neuropathy"},{"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:476394"},{"Age_At_Onset__c":"Adolescent","Provided_By__c":"ORPHA:476394"}],"External_Identifier_Disease__c":[{"URL__c":"https://www.ebi.ac.uk/ols4/ontologies/doid/classes?obo_id=DOID%3A0111560","Source__c":"MONDO:0033135","Xref__c":"DOID:0111560"},{"URL__c":"https://www.omim.org/entry/618279","Source__c":"C4748940; MONDO:0033135; ORPHA:476394","Xref__c":"OMIM:618279"},{"URL__c":"https://www.ncbi.nlm.nih.gov/medgen/?term=1648290","Source__c":"C4748940","Xref__c":"MEDGEN:1648290"},{"URL__c":"https://uts.nlm.nih.gov/uts/umls/concept/C4748940","Source__c":"C4748940","Xref__c":"C4748940"},{"URL__c":"https://www.orpha.net/en/disease/detail/476394","Source__c":"C4748940; MONDO:0033135","Xref__c":"ORPHA:476394"},{"URL__c":"http://purl.obolibrary.org/obo/MONDO_0033135","Source__c":"GARD:0017851","Xref__c":"MONDO:0033135"}],"GARD_Disease_Gene__c":[{"GeneSymbol__c":"PMP2","Gene_Type__c":"protein-coding gene","Causal_Gene__c":true}],"Inheritance__c":["Autosomal dominant"],"GARD_Disease_Feature__c":[{"Provided_By__c":"OMIM:618279","HPO_Frequency__c":"Very frequent (80-99%)","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":"OMIM:618279","HPO_Frequency__c":"Frequent (30-79%)","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:618279","HPO_Frequency__c":"Very frequent (80-99%)","Feature__r":{"HPO_Description__c":"Reduced strength of the distal musculature of the legs.","HPO_Feature_URL__c":"https://hpo.jax.org/browse/term/HP:0009053","HPO_Synonym__c":"Distal muscle weakness in lower limbs; Muscle weakness, lower limb, distal","HPO_Name__c":"Distal lower limb muscle weakness","Feature_System__c":"Musculoskeletal System","HPO_Feature_Type__c":"Symptom"}},{"Provided_By__c":"OMIM:618279","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:618279","HPO_Frequency__c":"Frequent (30-79%)","Feature__r":{"HPO_Description__c":"Absence of the Achilles reflex (also known as the ankle jerk reflex), which can normally be elicited by tapping the tendon is tapped while the foot is dorsiflexed.","HPO_Feature_URL__c":"https://hpo.jax.org/browse/term/HP:0003438","HPO_Synonym__c":"Absent ankle reflexes","HPO_Name__c":"Absent Achilles reflex","Feature_System__c":"Nervous System","HPO_Feature_Type__c":"Symptom"}},{"Provided_By__c":"OMIM:618279","HPO_Frequency__c":"Very frequent (80-99%)","Feature__r":{"HPO_Description__c":"Reduced level of the compound muscle action potential (CMAP), which is recorded following electrical stimulation of a nerve from surface electrodes overlying a muscle supplied by that nerve.","HPO_Feature_URL__c":"https://hpo.jax.org/browse/term/HP:0033383","HPO_Synonym__c":"Decreased CMAP amplitude","HPO_Name__c":"Decreased compound muscle action potential amplitude","Feature_System__c":"Nervous System","HPO_Feature_Type__c":"Procedure_NCV"}},{"Provided_By__c":"OMIM:618279","HPO_Frequency__c":"Frequent (30-79%)","Feature__r":{"HPO_Description__c":"Absence of the knee jerk reflex, which can normally be elicited by tapping the patellar tendon with a reflex hammer just below the patella.","HPO_Feature_URL__c":"https://hpo.jax.org/browse/term/HP:0006844","HPO_Synonym__c":"Absent knee jerk reflex","HPO_Name__c":"Absent patellar reflexes","Feature_System__c":"Nervous System","HPO_Feature_Type__c":"Symptom"}},{"Provided_By__c":"OMIM:618279","HPO_Frequency__c":"Very frequent (80-99%)","Feature__r":{"HPO_Description__c":"A loss of myelin from the internode regions along myelinated nerve fibers of the peripheral nervous system.","HPO_Feature_URL__c":"https://hpo.jax.org/browse/term/HP:0011096","HPO_Synonym__c":"Demyelination","HPO_Name__c":"Peripheral demyelination","Feature_System__c":"Nervous System","HPO_Feature_Type__c":"Symptom"}},{"Provided_By__c":"OMIM:618279","HPO_Frequency__c":"Very frequent (80-99%)","Feature__r":{"HPO_Description__c":"A decrease in the ability to perceive vibration in the distal portions of the limbs.","HPO_Feature_URL__c":"https://hpo.jax.org/browse/term/HP:0006886","HPO_Synonym__c":"Decreased distal vibration sense","HPO_Name__c":"Impaired distal vibration sensation","Feature_System__c":"Nervous System","HPO_Feature_Type__c":"Symptom"}},{"Provided_By__c":"OMIM:618279","HPO_Frequency__c":"Very frequent (80-99%)","Feature__r":{"HPO_Description__c":"An abnormal reduction in sensation in the distal portions of the extremities.","HPO_Feature_URL__c":"https://hpo.jax.org/browse/term/HP:0002936","HPO_Synonym__c":"Decreased distal sensation; Decreased sensation in extremities; Distal sensation loss; Distal sensory impairment in lower limbs; Distal sensory impairment of the lower extremities; Distal sensory loss; Distal sensory loss, upper and lower limbs; Loss of distal sensation","HPO_Name__c":"Distal sensory impairment","Feature_System__c":"Nervous System","HPO_Feature_Type__c":"Symptom"}},{"Provided_By__c":"OMIM:618279","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:618279","HPO_Frequency__c":"Very frequent (80-99%)","Feature__r":{"HPO_Description__c":"Muscle fibers degeneration resulting in fatty replacement of skeletal muscle fibers","HPO_Feature_URL__c":"https://hpo.jax.org/browse/term/HP:0012548","HPO_Synonym__c":"Skeletal muscle fatty infiltration","HPO_Name__c":"Fatty replacement of skeletal muscle","Feature_System__c":"Musculoskeletal System","HPO_Feature_Type__c":"Symptom"}},{"Provided_By__c":"OMIM:618279","HPO_Frequency__c":"Very frequent (80-99%)","Feature__r":{"HPO_Description__c":"Hyperextension of the metatarsal-phalangeal joint with hyperflexion of the proximal interphalangeal (PIP) joint.","HPO_Feature_URL__c":"https://hpo.jax.org/browse/term/HP:0001765","HPO_Synonym__c":"Hammer toe; Hammertoe; Hammertoes","HPO_Name__c":"Hammertoe","Feature_System__c":"Musculoskeletal System","HPO_Feature_Type__c":"Symptom"}},{"Provided_By__c":"OMIM:618279","HPO_Frequency__c":"Frequent (30-79%)","Feature__r":{"HPO_Description__c":"An unintentional, oscillating to-and-fro muscle movement affecting the hand.","HPO_Feature_URL__c":"https://hpo.jax.org/browse/term/HP:0002378","HPO_Synonym__c":"Hand tremor; Tremor of hand; Tremor of hands; tremors in hands","HPO_Name__c":"Hand tremor","Feature_System__c":"Nervous System","HPO_Feature_Type__c":"Symptom"}},{"Provided_By__c":"OMIM:618279","HPO_Frequency__c":"Very frequent (80-99%)","Feature__r":{"HPO_Description__c":"Repeated episodes of segmental demyelination and remyelination lead to the accumulation of supernumerary Schwann cells around axons, which is referred to as onion bulb formation. This finding affects peripheral nerves.","HPO_Feature_URL__c":"https://hpo.jax.org/browse/term/HP:0003383","HPO_Name__c":"Onion bulb formation","Feature_System__c":"Nervous System","HPO_Feature_Type__c":"Symptom"}},{"Provided_By__c":"OMIM:618279","HPO_Frequency__c":"Very frequent (80-99%)","Feature__r":{"HPO_Description__c":"Reduced ability to perceive painful stimuli.","HPO_Feature_URL__c":"https://hpo.jax.org/browse/term/HP:0007328","HPO_Synonym__c":"Decreased pain sensation; Decreased pinprick sensation; Impaired pain sensation","HPO_Name__c":"Impaired pain sensation","Feature_System__c":"Nervous System","HPO_Feature_Type__c":"Symptom"}},{"Provided_By__c":"OMIM:618279","HPO_Frequency__c":"Very frequent (80-99%)","Feature__r":{"HPO_Description__c":"Muscular atrophy affecting muscles in the distal portions of the extremities.","HPO_Feature_URL__c":"https://hpo.jax.org/browse/term/HP:0003693","HPO_Synonym__c":"Amyotrophy of distal limb muscles; Distal amyotrophy, especially of the hands and feet; Distal limb muscle atrophy; Distal muscle atrophy; Distal muscle atrophy, upper and lower limbs; Distal muscle degeneration; Distal muscle wasting; Distal muscular atrophy; Muscle atrophy, distal","HPO_Name__c":"Distal amyotrophy","Feature_System__c":"Musculoskeletal System","HPO_Feature_Type__c":"Symptom"}},{"Provided_By__c":"OMIM:618279","Feature__r":{"HPO_Description__c":"An abnormal gait pattern that arises from weakness of the pretibial and peroneal muscles due to a lower motor neuron lesion. Affected patients have footdrop and are unable to dorsiflex and evert the foot. The leg is lifted high on walking so that the toes clear the ground, and there may be a slapping noise when the foot strikes the ground again.","HPO_Feature_URL__c":"https://hpo.jax.org/browse/term/HP:0003376","HPO_Synonym__c":"High stepping","HPO_Name__c":"Steppage gait","Feature_System__c":"Nervous System","HPO_Feature_Type__c":"Symptom"}}],"tags":{"Cause":["Genetics"],"Disease Category":["Genetics","Neurology"],"Specialist":["Genetics","Neurology","Neuromuscular medicine","Pediatrics"],"Account":["Peripheral Neuropathy"]},"synonyms":["cmt1g"," pmp2-related charcot-marie-tooth disease type 1"," pmp2-related charcot-marie-tooth neuropathy type 1"," pmp2-related cmt1"," pmp2-related hereditary motor and sensory neuropathy type 1"]}