{"Name":"Charcot-Marie-Tooth Disease, axonal, type 2GG","DiseaseID__c":"GARD:0012437","id":12437,"encodedName":"charcot-marie-tooth-disease-axonal-type-2gg","IsDeleted":false,"Disease_Name_Full__c":"Charcot-Marie-Tooth Disease, axonal, type 2GG","Xref_IDs__c":"765744006; C5561933; C564702; DOID:0110202; MEDGEN:1794143; MONDO:0011675; OMIM:606483; ORPHA:100043","USA_Estimate__c":"1,000","No_of_Specialist_Tagsa__c":3,"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":3,"Disease_Characteristics_Score__c":8,"No_of_Age_at_Onset__c":1,"Description_Source__c":"MONDO:0011675","Disease_Description__c":"A rare hereditary motor and sensory neuropathy characterized by intermediate motor median nerve conduction velocities (usually between 25 and 45 m/s) and signs of both demyelination and axonal degeneration in nerve biopsies. It presents with usual clinical features of Charcot-Marie-Tooth disease (progressive muscle weakness and atrophy of the distal extremities, distal sensory loss, reduced or absent deep tendon reflexes, and feet deformities) in the first to second decade of life with steady progression until the fourth decade, severe progression and stabilization afterwards.","GARD_Name__c":"Charcot-Marie-Tooth Disease, axonal, type 2GG","GARD_Synonym__c":"autosomal dominant intermediate charcot-marie-tooth disease type a; charcot-marie-tooth disease dominant intermediate a; charcot-marie-tooth disease dominant intermediate ii; charcot-marie-tooth disease dominant intermediate type a; charcot-marie-tooth neuropathy dominant intermediate a; charcot-marie-tooth neuropathy, axonal, type 2gg; charcot-marie-tooth neuropathy, type 2gg; cmt2gg; cmtdia; di-cmta","Curated_Disease_Description_Source__c":"MONDO:0011675","Curated_Disease_Description__c":"A rare hereditary motor and sensory neuropathy characterized by intermediate motor median nerve conduction velocities (usually between 25 and 45 m/s) and signs of both demyelination and axonal degeneration in nerve biopsies. It presents with usual clinical features of Charcot-Marie-Tooth disease (progressive muscle weakness and atrophy of the distal extremities, distal sensory loss, reduced or absent deep tendon reflexes, and feet deformities) in the first to second decade of life with steady progression until the fourth decade, severe progression and stabilization afterwards.","Curated_USA_Estimate_Source__c":null,"Curated_USA_Estimate__c":"1,000","Age_at_Onset_Snippet_Text__c":"as an Adult","SourceID__c":"ORPHA:100043","Deprecated__c":"No","Disease_Concept_Type__c":"Rare Disease Entity","MONDO_ID__c":"MONDO:0011675","ORPHANET_ID__c":"ORPHA:100043","Replaced_By_ID__c":null,"Display_Spanish_Disease_Name__c":"Enfermedad de charcot-marie-tooth intermedia autosómica dominante tipo a","Spanish_Description_Source__c":"ORPHA:100043","Spanish_Description__c":"Es una neuropatía sensitivo-motora hereditaria poco frecuente caracterizada por velocidades de conducción nerviosa motora intermedias (generalmente entre 25 y 45 m/s) y signos tanto de desmielinización como de degeneración axonal en biopsias de nervio. Su forma de presentación es con los hallazgos clínicos habituales de la enfermedad de Charcot-Marie-Tooth (debilidad muscular progresiva y atrofia distal de extremidades, déficit sensitivo distal, reflejos tendinosos profundos reducidos o ausentes y deformidades de los pies) en la primera o segunda décadas de la vida, con progresión constante hasta la cuarta década y, posteriormente, progresión grave y estabilización.","Spanish_Disease_Name__c":"enfermedad de charcot-marie-tooth intermedia autosómica dominante tipo a","Spanish_GARD_Synonym__c":"cmtdia","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 hereditary motor and sensory neuropathy characterized by intermediate motor median nerve conduction velocities (usually between 25 and 45 m/s) and signs of both demyelination and axonal degeneration in nerve biopsies. It presents with usual clinical features of Charcot-Marie-Tooth disease (progressive muscle weakness and atrophy of the distal extremities, distal sensory loss, reduced or absent deep tendon reflexes, and feet deformities) in the first to second decade of life with steady progression until the fourth decade, severe progression and stabilization afterwards.","Curated_Disease_Description_Source__c":"MONDO:0011675","GARD_Synonym__c":"autosomal dominant intermediate charcot-marie-tooth disease type a; charcot-marie-tooth disease dominant intermediate a; charcot-marie-tooth disease dominant intermediate ii; charcot-marie-tooth disease dominant intermediate type a; charcot-marie-tooth neuropathy dominant intermediate a; charcot-marie-tooth neuropathy, axonal, type 2gg; charcot-marie-tooth neuropathy, type 2gg; cmt2gg; cmtdia; di-cmta","Name":"Charcot-Marie-Tooth Disease, axonal, type 2GG","Curated_USA_Estimate__c":"1,000","estimateUsa":"1,000"}],"Organization_Supported_Diseases__c":[{"Account_Name__c":"Muscular Dystrophy Canada","Website__c":"https://muscle.ca/"},{"Account_Name__c":"Charcot-Marie-Tooth Association","Website__c":"https://www.cmtausa.org/"},{"Account_Name__c":"Charcot-Marie-Tooth Association Australia Inc.","Website__c":"https://www.cmt.org.au"}],"GARD_Disease_Tag__c":[{"Tag_Name__c":"Genetics","Tag_Category__c":"Cause;Disease Category;Specialist","category_description":"Genetic diseases affect the DNA, or genetic instructions, which directs how tissues, organs, and body systems function.","curated_tag_name":"Genetic diseases"},{"Tag_Name__c":"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"}],"Age_At_Onset__c":[{"Age_At_Onset__c":"Adult","Provided_By__c":"ORPHA:100043"}],"External_Identifier_Disease__c":[{"URL__c":"https://uts.nlm.nih.gov/uts/umls/concept/C5561933","Source__c":"C5561933","Xref__c":"C5561933"},{"URL__c":"https://www.ebi.ac.uk/ols4/ontologies/doid/classes?obo_id=DOID%3A0110202","Source__c":"MONDO:0011675","Xref__c":"DOID:0110202"},{"URL__c":"https://browser.ihtsdotools.org/?perspective=full&conceptId1=765744006","Source__c":"MONDO:0011675","Xref__c":"765744006"},{"URL__c":"https://www.orpha.net/en/disease/detail/100043","Source__c":"C5561933; MONDO:0011675","Xref__c":"ORPHA:100043"},{"URL__c":"https://www.omim.org/entry/606483","Source__c":"C5561933; MONDO:0011675; ORPHA:100043","Xref__c":"OMIM:606483"},{"URL__c":"https://www.ncbi.nlm.nih.gov/medgen/?term=1794143","Source__c":"C5561933","Xref__c":"MEDGEN:1794143"},{"URL__c":"https://www.ncbi.nlm.nih.gov/mesh/C564702","Source__c":"MONDO:0011675","Xref__c":"C564702"},{"URL__c":"http://purl.obolibrary.org/obo/MONDO_0011675","Source__c":"GARD:0012437","Xref__c":"MONDO:0011675"}],"GARD_Disease_Gene__c":[{"GeneSymbol__c":"GBF1","Gene_Type__c":"protein-coding gene","Causal_Gene__c":true}],"Inheritance__c":["Autosomal dominant"],"GARD_Disease_Feature__c":[{"Provided_By__c":"OMIM:606483","HPO_Frequency__c":"Occasional (5-29%)","Feature__r":{"HPO_Description__c":"Dysarthric speech is a general description referring to a neurological speech disorder characterized by poor articulation. Depending on the involved neurological structures, dysarthria may be further classified as spastic, flaccid, ataxic, hyperkinetic and hypokinetic, or mixed.","HPO_Feature_URL__c":"https://hpo.jax.org/browse/term/HP:0001260","HPO_Synonym__c":"Difficulty articulating speech; Dysarthric speech","HPO_Name__c":"Dysarthria","Feature_System__c":"Nervous System","HPO_Feature_Type__c":"Symptom"}},{"Provided_By__c":"OMIM:606483","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:606483","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:606483","Feature__r":{"HPO_Description__c":"A segmental pattern of demyelination and regeneration (remyelination) affecting peripheral nerves.","HPO_Feature_URL__c":"https://hpo.jax.org/browse/term/HP:0003481","HPO_Synonym__c":"Segmental demyelination/remyelination","HPO_Name__c":"Segmental peripheral demyelination/remyelination","Feature_System__c":"Nervous System","HPO_Feature_Type__c":"Symptom"}},{"Provided_By__c":"OMIM:606483","HPO_Frequency__c":"Frequent (30-79%)","Feature__r":{"HPO_Description__c":"The term gait disturbance can refer to any disruption of the ability to walk.","HPO_Feature_URL__c":"https://hpo.jax.org/browse/term/HP:0001288","HPO_Synonym__c":"Abnormal gait; Abnormal walk; Difficulty in walking; Gait abnormalities; Gait difficulties; Gait disturbances; Impaired gait; Walking disability","HPO_Name__c":"Gait disturbance","Feature_System__c":"Nervous System","HPO_Feature_Type__c":"Symptom"}},{"Provided_By__c":"OMIM:606483","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":"OMIM:606483","HPO_Frequency__c":"Frequent (30-79%)","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:606483","HPO_Frequency__c":"Frequent (30-79%)","Feature__r":{"HPO_Description__c":"Weakness of the muscles responsible for dorsiflexion of the foot, that is, of the movement of the toes towards the shin. The foot dorsiflexors include the tibialis anterior, the extensor hallucis longus, the extensor digitorum longus, and the peroneus tertius muscles.","HPO_Feature_URL__c":"https://hpo.jax.org/browse/term/HP:0009027","HPO_Synonym__c":"Foot drop; Foot extensor weakness; Footdrop; Inability to heel walk; Inability to walk on heels","HPO_Name__c":"Foot dorsiflexor weakness","Feature_System__c":"Musculoskeletal System","HPO_Feature_Type__c":"Symptom"}},{"Provided_By__c":"OMIM:606483","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:606483","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:606483","HPO_Frequency__c":"Occasional (5-29%)","Feature__r":{"HPO_Description__c":"Wasting of thenar muscles, which are located on palm of the hand at the base of the thumb.","HPO_Feature_URL__c":"https://hpo.jax.org/browse/term/HP:0003393","HPO_Synonym__c":"Thenar atrophy","HPO_Name__c":"Thenar muscle atrophy","Feature_System__c":"Musculoskeletal System","HPO_Feature_Type__c":"Symptom"}},{"Provided_By__c":"OMIM:606483","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:606483","HPO_Frequency__c":"Very frequent (80-99%)","Feature__r":{"HPO_Description__c":"The presence of characteristic findings of denervation on electromyography (fibrillations, positive sharp waves, and giant motor unit potentials).","HPO_Feature_URL__c":"https://hpo.jax.org/browse/term/HP:0003445","HPO_Synonym__c":"EMG: neurogenic abnormalities; EMG: neurogenic changes; EMG: neurogenic findings","HPO_Name__c":"EMG: neuropathic changes","Feature_System__c":"Musculoskeletal System","HPO_Feature_Type__c":"Procedure_EMG"}},{"Provided_By__c":"OMIM:606483","HPO_Frequency__c":"Occasional (5-29%)","Feature__r":{"HPO_Description__c":"Reduction of neurologic reflexes such as the knee-jerk reaction.","HPO_Feature_URL__c":"https://hpo.jax.org/browse/term/HP:0001265","HPO_Synonym__c":"Decreased reflex response; Decreased reflexes","HPO_Name__c":"Hyporeflexia","Feature_System__c":"Nervous System","HPO_Feature_Type__c":"Symptom"}},{"Provided_By__c":"OMIM:606483","Feature__r":{"HPO_Description__c":"A loss of myelin from the internode regions along myelinated nerve fibers from segments of the peripheral nervous system.","HPO_Feature_URL__c":"https://hpo.jax.org/browse/term/HP:0007107","HPO_Name__c":"Segmental peripheral demyelination","Feature_System__c":"Nervous System","HPO_Feature_Type__c":"Symptom"}},{"Provided_By__c":"OMIM:606483","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"}},{"Provided_By__c":"OMIM:606483","Feature__r":{"HPO_Description__c":"A pattern of simultaneous degeneration and regeneration of axons (see comment).","HPO_Feature_URL__c":"https://hpo.jax.org/browse/term/HP:0003378","HPO_Synonym__c":"Axon degeneration and regeneration","HPO_Name__c":"Axonal degeneration/regeneration","Feature_System__c":"Nervous System","HPO_Feature_Type__c":"Symptom"}},{"Provided_By__c":"OMIM:606483","HPO_Frequency__c":"Occasional (5-29%)","Feature__r":{"HPO_Description__c":"A type of Developmental delay characterized by a delay in acquiring motor skills.","HPO_Feature_URL__c":"https://hpo.jax.org/browse/term/HP:0001270","HPO_Synonym__c":"Delay in development of motor milestones; Delay in motor development; Delayed development of motor milestones; Delayed early motor milestones; Delayed motor development; Delayed motor milestones; Locomotor delay; Motor developmental delay; Motor developmental milestones not achieved; Motor retardation; Retarded motor development; Slow development of motor milestones","HPO_Name__c":"Motor delay","Feature_System__c":"Nervous System","HPO_Feature_Type__c":"Symptom"}},{"Provided_By__c":"OMIM:606483","HPO_Frequency__c":"Occasional (5-29%)","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"}}],"tags":{"Cause":["Genetics"],"Disease Category":["Genetics","Neurology"],"Specialist":["Genetics","Neurology","Neuromuscular medicine"],"Account":["Peripheral Neuropathy"]},"synonyms":["autosomal dominant intermediate charcot-marie-tooth disease type a"," charcot-marie-tooth disease dominant intermediate a"," charcot-marie-tooth disease dominant intermediate ii"," charcot-marie-tooth disease dominant intermediate type a"," charcot-marie-tooth neuropathy dominant intermediate a"," charcot-marie-tooth neuropathy, axonal, type 2gg"," charcot-marie-tooth neuropathy, type 2gg"," cmt2gg"," cmtdia"," di-cmta"]}