{"Name":"Charcot-Marie-Tooth disease axonal type 2Z","DiseaseID__c":"GARD:0017829","id":17829,"encodedName":"charcot-marie-tooth-disease-axonal-type-2z","IsDeleted":false,"Disease_Name_Full__c":"Charcot-Marie-Tooth disease axonal type 2Z","Xref_IDs__c":"C5569025; DOID:0110181; MEDGEN:1800448; MONDO:0014736; OMIM:616688; ORPHA:466768","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":4,"Disease_Characteristics_Score__c":8,"No_of_Age_at_Onset__c":5,"Description_Source__c":"MONDO:0014736","Disease_Description__c":"Any Charcot-Marie-Tooth disease in which the cause of the disease is a mutation in the MORC2 gene.","GARD_Name__c":"Charcot-Marie-Tooth disease axonal type 2Z","GARD_Synonym__c":"autosomal dominant axonal charcot-marie-tooth disease type 2z; autosomal dominant charcot-marie-tooth disease type 2 due to morc2 (morc family cw-type zinc finger 2) mutation; autosomal dominant charcot-marie-tooth disease type 2 due to morc2 mutation; autosomal dominant charcot-marie-tooth disease type 2z; charcot-marie-tooth disease caused by mutation in morc2; charcot-marie-tooth disease, axonal, autosomal dominant, type 2z; charcot-marie-tooth disease, axonal, type 2z; charcot-marie-tooth neuropathy type 2z; charcot-marie-tooth neuropathy, type 2z; cmt2z; morc2 charcot-marie-tooth disease","Curated_Disease_Description_Source__c":"ORPHA:466768","Curated_Disease_Description__c":"A rare autosomal dominant hereditary axonal motor and sensory neuropathy characterized by early onset of generalized hypotonia and weakness, or later onset of distal lower limb muscle weakness and atrophy, cramps, and sensory impairment. Weakness and atrophy progress in an asymmetric fashion to involve also the proximal and upper limbs in the course of the disease. Additional features are pyramidal signs like increased muscle tone and extensor plantar reflexes, as well as learning difficulties.","Curated_USA_Estimate_Source__c":null,"Curated_USA_Estimate__c":"1,000","Age_at_Onset_Snippet_Text__c":"at a variety of ages","SourceID__c":"ORPHA:466768","Deprecated__c":"No","Disease_Concept_Type__c":"Rare Disease Entity","MONDO_ID__c":"MONDO:0014736","ORPHANET_ID__c":"ORPHA:466768","Replaced_By_ID__c":null,"Display_Spanish_Disease_Name__c":"Enfermedad de charcot-marie-tooth autosómica dominante tipo 2z","Spanish_Description_Source__c":null,"Spanish_Description__c":null,"Spanish_Disease_Name__c":"enfermedad de charcot-marie-tooth autosómica dominante tipo 2z","Spanish_GARD_Synonym__c":"cmt2z; enfermedad de charcot-marie-tooth autosómica dominante tipo 2 por una mutación en el gen morc2","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 axonal motor and sensory neuropathy characterized by early onset of generalized hypotonia and weakness, or later onset of distal lower limb muscle weakness and atrophy, cramps, and sensory impairment. Weakness and atrophy progress in an asymmetric fashion to involve also the proximal and upper limbs in the course of the disease. Additional features are pyramidal signs like increased muscle tone and extensor plantar reflexes, as well as learning difficulties.","Curated_Disease_Description_Source__c":"ORPHA:466768","GARD_Synonym__c":"autosomal dominant axonal charcot-marie-tooth disease type 2z; autosomal dominant charcot-marie-tooth disease type 2 due to morc2 (morc family cw-type zinc finger 2) mutation; autosomal dominant charcot-marie-tooth disease type 2 due to morc2 mutation; autosomal dominant charcot-marie-tooth disease type 2z; charcot-marie-tooth disease caused by mutation in morc2; charcot-marie-tooth disease, axonal, autosomal dominant, type 2z; charcot-marie-tooth disease, axonal, type 2z; charcot-marie-tooth neuropathy type 2z; charcot-marie-tooth neuropathy, type 2z; cmt2z; morc2 charcot-marie-tooth disease","Name":"Charcot-Marie-Tooth disease axonal type 2Z","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":"Adult","Provided_By__c":"ORPHA:466768"},{"Age_At_Onset__c":"Neonatal","Provided_By__c":"ORPHA:466768"},{"Age_At_Onset__c":"Adolescent","Provided_By__c":"ORPHA:466768"},{"Age_At_Onset__c":"Childhood","Provided_By__c":"ORPHA:466768"},{"Age_At_Onset__c":"Infancy","Provided_By__c":"ORPHA:466768"}],"External_Identifier_Disease__c":[{"URL__c":"https://www.omim.org/entry/616688","Source__c":"C5569025; MONDO:0014736; ORPHA:466768","Xref__c":"OMIM:616688"},{"URL__c":"https://www.ebi.ac.uk/ols4/ontologies/doid/classes?obo_id=DOID%3A0110181","Source__c":"MONDO:0014736","Xref__c":"DOID:0110181"},{"URL__c":"https://www.orpha.net/en/disease/detail/466768","Source__c":"C5569025; MONDO:0014736; ORPHA:466768","Xref__c":"ORPHA:466768"},{"URL__c":"https://uts.nlm.nih.gov/uts/umls/concept/C5569025","Source__c":"C5569025","Xref__c":"C5569025"},{"URL__c":"https://www.ncbi.nlm.nih.gov/medgen/?term=1800448","Source__c":"C5569025","Xref__c":"MEDGEN:1800448"},{"URL__c":"http://purl.obolibrary.org/obo/MONDO_0014736","Source__c":"GARD:0017829","Xref__c":"MONDO:0014736"},{"URL__c":"https://browser.ihtsdotools.org/?perspective=full&conceptId1=1187564009","Source__c":"C5569025","Xref__c":"1187564009"}],"GARD_Disease_Gene__c":[{"GeneSymbol__c":"MORC2","Gene_Type__c":"protein-coding gene","Causal_Gene__c":true}],"Inheritance__c":["Autosomal dominant"],"GARD_Disease_Feature__c":[{"Provided_By__c":"ORPHA:466768","HPO_Frequency__c":"Occasional (5-29%)","Feature__r":{"HPO_Description__c":"A lack of strength of the proximal muscles.","HPO_Feature_URL__c":"https://hpo.jax.org/browse/term/HP:0003701","HPO_Synonym__c":"Muscle weakness, proximal; Proximal limb muscle weakness; Proximal limb weakness; Weakness in muscles of upper arms and upper legs","HPO_Name__c":"Proximal muscle weakness","Feature_System__c":"Musculoskeletal System","HPO_Feature_Type__c":"Symptom"}},{"Provided_By__c":"ORPHA:466768","HPO_Frequency__c":"Occasional (5-29%)","Feature__r":{"HPO_Description__c":"Partial or complete wasting (loss) of brain tissue that was once present.","HPO_Feature_URL__c":"https://hpo.jax.org/browse/term/HP:0012444","HPO_Synonym__c":"Brain degeneration; Brain wasting","HPO_Name__c":"Brain atrophy","Feature_System__c":"Nervous System","HPO_Feature_Type__c":"Symptom"}},{"Provided_By__c":"ORPHA:466768","HPO_Frequency__c":"Occasional (5-29%)","Feature__r":{"HPO_Description__c":"A decreased magnitude of the sensory perception of sound.","HPO_Feature_URL__c":"https://hpo.jax.org/browse/term/HP:0000365","HPO_Synonym__c":"Deafness; Hearing defect; Hearing impairment; Hypacusis","HPO_Name__c":"Hearing impairment","HPO_Feature_Type__c":"Symptom"}},{"Provided_By__c":"ORPHA:466768","HPO_Frequency__c":"Occasional (5-29%)","Feature__r":{"HPO_Description__c":"Any anomaly in the process by which myelin sheaths are formed and maintained around neurons.","HPO_Feature_URL__c":"https://hpo.jax.org/browse/term/HP:0012447","HPO_Name__c":"Abnormal myelination","Feature_System__c":"Nervous System","HPO_Feature_Type__c":"Symptom"}},{"Provided_By__c":"ORPHA:466768","HPO_Frequency__c":"Uncommon (<1-4%)","Feature__r":{"HPO_Feature_URL__c":"https://hpo.jax.org/browse/term/HP:0002747","HPO_Synonym__c":"Decreased lung function due to weak breathing muscles; Decreased respiratory function due to muscle weakness; Respiratory distress due to muscle weakness; Respiratory failure due to muscle weakness; Respiratory muscle weakness","HPO_Name__c":"Respiratory insufficiency due to muscle weakness","Feature_System__c":"Musculoskeletal System; Respiratory system","HPO_Feature_Type__c":"Symptom"}},{"Provided_By__c":"ORPHA:466768","HPO_Frequency__c":"Frequent (30-79%)","Feature__r":{"HPO_Description__c":"Muscular atrophy involving the muscles of the upper limbs.","HPO_Feature_URL__c":"https://hpo.jax.org/browse/term/HP:0009129","HPO_Synonym__c":"Amyotrophy involving the upper limbs","HPO_Name__c":"Upper limb amyotrophy","Feature_System__c":"Musculoskeletal System","HPO_Feature_Type__c":"Symptom"}},{"Provided_By__c":"ORPHA:466768","HPO_Frequency__c":"Frequent (30-79%)","Feature__r":{"HPO_Description__c":"A functional anomaly of the upper motor neuron. The upper motor neurons are neurons of the primary motor cortex which project to the brainstem and spinal chord via the corticonuclear, corticobulbar and corticospinal (pyramidal) tracts. They are involved in control of voluntary movements. Dysfunction leads to weakness, impairment of fine motor movements, spasticity, hyperreflexia and abnormal pyramidal signs.","HPO_Feature_URL__c":"https://hpo.jax.org/browse/term/HP:0002493","HPO_Synonym__c":"Corticospinal tract dysfunction; Pyramidal tract dysfunction","HPO_Name__c":"Upper motor neuron dysfunction","Feature_System__c":"Nervous System","HPO_Feature_Type__c":"Symptom"}},{"Provided_By__c":"ORPHA:466768","HPO_Frequency__c":"Frequent (30-79%)","Feature__r":{"HPO_Description__c":"Contractures of one ore more joints of the hands meaning chronic loss of joint motion due to structural changes in non-bony tissue.","HPO_Feature_URL__c":"https://hpo.jax.org/browse/term/HP:0009473","HPO_Synonym__c":"Contractures involving the hands; Contractures of the hands","HPO_Name__c":"Joint contracture of the hand","Feature_System__c":"Musculoskeletal System","HPO_Feature_Type__c":"Symptom"}},{"Provided_By__c":"ORPHA:466768","HPO_Frequency__c":"Occasional (5-29%)","Feature__r":{"HPO_Description__c":"An unintentional, oscillating to-and-fro muscle movement affecting the tongue.","HPO_Feature_URL__c":"https://hpo.jax.org/browse/term/HP:0031947","HPO_Name__c":"Tongue tremor","Feature_System__c":"Nervous System","HPO_Feature_Type__c":"Symptom"}},{"Provided_By__c":"ORPHA:466768","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":"ORPHA:466768","HPO_Frequency__c":"Very frequent (80-99%)","Feature__r":{"HPO_Feature_URL__c":"https://hpo.jax.org/browse/term/HP:0100290","HPO_Name__c":"Abnormality of peripheral somatosensory evoked potentials","Feature_System__c":"Nervous System","HPO_Feature_Type__c":"Symptom"}},{"Provided_By__c":"ORPHA:466768","HPO_Frequency__c":"Occasional (5-29%)","Feature__r":{"HPO_Description__c":"Weakness of the limb-girdle muscles (also known as the pelvic and shoulder girdles), that is, lack of strength of the muscles around the shoulders and the pelvis.","HPO_Feature_URL__c":"https://hpo.jax.org/browse/term/HP:0003325","HPO_Synonym__c":"Limb girdle weakness; Muscle weakness, limb-girdle; Muscular weakness, limb-girdle","HPO_Name__c":"Limb-girdle muscle weakness","Feature_System__c":"Musculoskeletal System","HPO_Feature_Type__c":"Symptom"}},{"Provided_By__c":"ORPHA:466768","HPO_Frequency__c":"Very frequent (80-99%)","Feature__r":{"HPO_Description__c":"An axonal neuropathy of peripheral sensory nerves.","HPO_Feature_URL__c":"https://hpo.jax.org/browse/term/HP:0003390","HPO_Synonym__c":"Axonal sensory neuropathy","HPO_Name__c":"Sensory axonal neuropathy","Feature_System__c":"Nervous System","HPO_Feature_Type__c":"Symptom"}},{"Provided_By__c":"ORPHA:466768","HPO_Frequency__c":"Occasional (5-29%)","Feature__r":{"HPO_Description__c":"Muscular weakness and atrophy related to loss of the motor neurons of the spinal cord and brainstem.","HPO_Feature_URL__c":"https://hpo.jax.org/browse/term/HP:0007269","HPO_Synonym__c":"Spinal muscle degeneration; Spinal muscle wasting","HPO_Name__c":"Spinal muscular atrophy","Feature_System__c":"Musculoskeletal System","HPO_Feature_Type__c":"Symptom"}},{"Provided_By__c":"ORPHA:466768","HPO_Frequency__c":"Frequent (30-79%)","Feature__r":{"HPO_Description__c":"A reduced sense of touch (tactile sensation). This is usually tested with a wisp of cotton or a fine camel's hair brush, by asking patients to say 'now' each time they feel the stimulus.","HPO_Feature_URL__c":"https://hpo.jax.org/browse/term/HP:0010830","HPO_Synonym__c":"Abnormal thigmesthesia; Impaired touch sensation; Loss of tactile sensation","HPO_Name__c":"Impaired tactile sensation","Feature_System__c":"Nervous System","HPO_Feature_Type__c":"Symptom"}},{"Provided_By__c":"ORPHA:466768","HPO_Frequency__c":"Occasional (5-29%)","Feature__r":{"HPO_Description__c":"Muscular atrophy affecting the muscles of the limb girdle.","HPO_Feature_URL__c":"https://hpo.jax.org/browse/term/HP:0003797","HPO_Synonym__c":"Wasting of limb-girdle muscle","HPO_Name__c":"Limb-girdle muscle atrophy","Feature_System__c":"Musculoskeletal System","HPO_Feature_Type__c":"Symptom"}},{"Provided_By__c":"ORPHA:466768","HPO_Frequency__c":"Occasional (5-29%)","Feature__r":{"HPO_Description__c":"Incapability to ambulate.","HPO_Feature_URL__c":"https://hpo.jax.org/browse/term/HP:0002540","HPO_Synonym__c":"Inability to walk; Non-ambulatory","HPO_Name__c":"Inability to walk","Feature_System__c":"Nervous System","HPO_Feature_Type__c":"Symptom"}},{"Provided_By__c":"ORPHA:466768","HPO_Frequency__c":"Uncommon (<1-4%)","Feature__r":{"HPO_Description__c":"Generalized muscular hypotonia (abnormally low muscle tone).","HPO_Feature_URL__c":"https://hpo.jax.org/browse/term/HP:0001290","HPO_Synonym__c":"Generalized decreased muscle tone; Generalized muscular hypotonia; Hypotonia, generalized","HPO_Name__c":"Generalized hypotonia","Feature_System__c":"Musculoskeletal System","HPO_Feature_Type__c":"Symptom"}},{"Provided_By__c":"ORPHA:466768","HPO_Frequency__c":"Uncommon (<1-4%)","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:466768","HPO_Frequency__c":"Frequent (30-79%)","Feature__r":{"HPO_Description__c":"Muscular atrophy affecting proximally located muscles of the arms.","HPO_Feature_URL__c":"https://hpo.jax.org/browse/term/HP:0008948","HPO_Synonym__c":"Proximal muscle atrophy in upper limbs; Proximal upper limb muscle atrophy","HPO_Name__c":"Proximal upper limb amyotrophy","Feature_System__c":"Musculoskeletal System","HPO_Feature_Type__c":"Symptom"}},{"Provided_By__c":"ORPHA:466768","HPO_Frequency__c":"Occasional (5-29%)","Feature__r":{"HPO_Description__c":"A form of colorblindness in which only two of the three fundamental colors can be distinguished due to a lack of one of the retinal cone pigments.","HPO_Feature_URL__c":"https://hpo.jax.org/browse/term/HP:0007641","HPO_Synonym__c":"Color blindness","HPO_Name__c":"Dyschromatopsia","HPO_Feature_Type__c":"Symptom"}},{"Provided_By__c":"ORPHA:466768","HPO_Frequency__c":"Occasional (5-29%)","Feature__r":{"HPO_Description__c":"Periventricular leukomalacia is characterized by diffuse injury of deep cerebral white matter, accompanied in its most severe form by focal necrosis. 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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:466768","HPO_Frequency__c":"Frequent (30-79%)","Feature__r":{"HPO_Description__c":"A subjective feeling of tiredness characterized by a lack of energy and motivation.","HPO_Feature_URL__c":"https://hpo.jax.org/browse/term/HP:0012378","HPO_Synonym__c":"Fatigue; 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It is characterized by poorly defined erythema with edema, vesicles, and weeping in the acute stage and skin thickening (lichenification) in the chronic stage.","HPO_Feature_URL__c":"https://hpo.jax.org/browse/term/HP:0001047","HPO_Synonym__c":"Allergic eczema; Atopic dermatitis, chronic; Atopic eczema; Dermatitis, Atopic; Infantile eczema; Neurodermatitis; Prurigo Besnier","HPO_Name__c":"Atopic dermatitis","Feature_System__c":"Skin System; Immune System","HPO_Feature_Type__c":"Symptom"}},{"Provided_By__c":"ORPHA:466768","HPO_Frequency__c":"Frequent (30-79%)","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:466768","HPO_Frequency__c":"Frequent (30-79%)","Feature__r":{"HPO_Description__c":"Reduced ability to run.","HPO_Feature_URL__c":"https://hpo.jax.org/browse/term/HP:0009046","HPO_Synonym__c":"Difficulty running","HPO_Name__c":"Difficulty running","Feature_System__c":"Musculoskeletal System","HPO_Feature_Type__c":"Symptom"}},{"Provided_By__c":"ORPHA:466768","HPO_Frequency__c":"Occasional (5-29%)","Feature__r":{"HPO_Description__c":"A condition in which there is increased muscle tone so that arms or legs, for example, are stiff and difficult to move.","HPO_Feature_URL__c":"https://hpo.jax.org/browse/term/HP:0001276","HPO_Synonym__c":"Hypertonicity; Increased muscle tone","HPO_Name__c":"Hypertonia","Feature_System__c":"Musculoskeletal System","HPO_Feature_Type__c":"Symptom"}},{"Provided_By__c":"ORPHA:466768","HPO_Frequency__c":"Frequent (30-79%)","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:466768","HPO_Frequency__c":"Frequent (30-79%)","Feature__r":{"HPO_Description__c":"An abnormality of the primary sensation that is mediated by peripheral nerves (pain, temperature, touch, vibration, joint position). The word hypoesthesia (or hypesthesia) refers to a reduction in cutaneous sensation to a specific type of testing.","HPO_Feature_URL__c":"https://hpo.jax.org/browse/term/HP:0003474","HPO_Synonym__c":"Sensory impairment","HPO_Name__c":"Somatic sensory dysfunction","Feature_System__c":"Nervous System","HPO_Feature_Type__c":"Symptom"}},{"Provided_By__c":"ORPHA:466768","HPO_Frequency__c":"Frequent (30-79%)","Feature__r":{"HPO_Feature_URL__c":"https://hpo.jax.org/browse/term/HP:0040131","HPO_Name__c":"Abnormal motor nerve conduction velocity","Feature_System__c":"Nervous System","HPO_Feature_Type__c":"Procedure_NCV"}},{"Provided_By__c":"ORPHA:466768","HPO_Frequency__c":"Occasional (5-29%)","Feature__r":{"HPO_Description__c":"A persistent (minutes to hours) abnormal increase in the pitch (frequency) of the voice for the context or social situation or significantly different from baseline of the individual.","HPO_Feature_URL__c":"https://hpo.jax.org/browse/term/HP:0001620","HPO_Synonym__c":"High pitched voice; High-pitched voice","HPO_Name__c":"Abnormally high-pitched voice","Feature_System__c":"Nervous System","HPO_Feature_Type__c":"Symptom"}},{"Provided_By__c":"ORPHA:466768","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":"ORPHA:466768","HPO_Frequency__c":"Occasional (5-29%)","Feature__r":{"HPO_Description__c":"An abnormal gait pattern characterized by the failure of the heel to contact the floor at the onset of stance during gait.","HPO_Feature_URL__c":"https://hpo.jax.org/browse/term/HP:0030051","HPO_Synonym__c":"Tiptoe gait; Toe walking; Walking on tiptoes","HPO_Name__c":"Tip-toe gait","Feature_System__c":"Nervous System","HPO_Feature_Type__c":"Symptom"}},{"Provided_By__c":"ORPHA:466768","HPO_Frequency__c":"Uncommon (<1-4%)","Feature__r":{"HPO_Description__c":"An abnormal morphology (form) of the face or its components.","HPO_Feature_URL__c":"https://hpo.jax.org/browse/term/HP:0001999","HPO_Synonym__c":"Abnormal facial shape; Abnormal morphology of the face; Distinctive facies; Dysmorphic facial features; Dysmorphic facies; Facial dysmorphism; Unusual facial appearance; Unusual facies","HPO_Name__c":"Abnormal facial shape","HPO_Feature_Type__c":"Symptom"}},{"Provided_By__c":"ORPHA:466768","HPO_Frequency__c":"Very frequent (80-99%)","Feature__r":{"HPO_Description__c":"Diminution of tendon reflexes, which is an invariable sign of peripheral nerve disease.","HPO_Feature_URL__c":"https://hpo.jax.org/browse/term/HP:0001315","HPO_Synonym__c":"Absent or decreased deep tendon reflexes; Decreased deep tendon reflexes; Decreased tendon reflexes; Decreased to absent deep tendon reflexes; Decreased/absent deep tendon reflexes; Depressed tendon reflexes; Diminished deep tendon reflexes; Diminished or absent deep tendon reflexes; Diminished or absent tendon reflexes; Hypoactive to absent deep tendon reflexes; Impaired tendon reflexes; Reduced/absent deep tendon reflexes; Weak or absent deep tendon reflexes","HPO_Name__c":"Reduced tendon reflexes","Feature_System__c":"Nervous System","HPO_Feature_Type__c":"Symptom"}},{"Provided_By__c":"ORPHA:466768","HPO_Frequency__c":"Frequent (30-79%)","Feature__r":{"HPO_Description__c":"A reduction in the amplitude of sensory nerve action potential in distal nerve segments. This feature is measured by nerve conduction studies.","HPO_Feature_URL__c":"https://hpo.jax.org/browse/term/HP:0007230","HPO_Name__c":"Decreased distal sensory nerve action potential","Feature_System__c":"Nervous System","HPO_Feature_Type__c":"Procedure_NCV"}},{"Provided_By__c":"ORPHA:466768","HPO_Frequency__c":"Frequent (30-79%)","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":"ORPHA:466768","HPO_Frequency__c":"Occasional (5-29%)","Feature__r":{"HPO_Description__c":"Multiple bent (flexed) finger joints that cannot be straightened actively or passively.","HPO_Feature_URL__c":"https://hpo.jax.org/browse/term/HP:0005879","HPO_Synonym__c":"Congenital finger contractures","HPO_Name__c":"Congenital finger flexion contractures","Feature_System__c":"Musculoskeletal System","HPO_Feature_Type__c":"Symptom"}},{"Provided_By__c":"ORPHA:466768","HPO_Frequency__c":"Occasional (5-29%)","Feature__r":{"HPO_Description__c":"Reduced strength of the distal musculature of the arms.","HPO_Feature_URL__c":"https://hpo.jax.org/browse/term/HP:0008959","HPO_Name__c":"Distal upper limb muscle weakness","Feature_System__c":"Musculoskeletal System","HPO_Feature_Type__c":"Symptom"}},{"Provided_By__c":"ORPHA:466768","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":"ORPHA:466768","HPO_Frequency__c":"Frequent (30-79%)","Feature__r":{"HPO_Description__c":"Upturning of the big toe (and sometimes fanning of the other toes) in response to stimulation of the sole of the foot. If the Babinski sign is present it can indicate damage to the corticospinal tract.","HPO_Feature_URL__c":"https://hpo.jax.org/browse/term/HP:0003487","HPO_Synonym__c":"Extensor plantar reflexes; Extensor plantar response; Extensor plantar responses; Positive Babinski sign","HPO_Name__c":"Babinski sign","Feature_System__c":"Nervous System","HPO_Feature_Type__c":"Symptom"}},{"Provided_By__c":"ORPHA:466768","HPO_Frequency__c":"Frequent (30-79%)","Feature__r":{"HPO_Description__c":"Weakness of the muscles of the arms.","HPO_Feature_URL__c":"https://hpo.jax.org/browse/term/HP:0003484","HPO_Synonym__c":"Decreased arm strength; Weak arm","HPO_Name__c":"Upper limb muscle weakness","Feature_System__c":"Musculoskeletal System","HPO_Feature_Type__c":"Symptom"}},{"Provided_By__c":"ORPHA:466768","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:466768","HPO_Frequency__c":"Very frequent (80-99%)","Feature__r":{"HPO_Description__c":"Muscular atrophy of distal leg muscles.","HPO_Feature_URL__c":"https://hpo.jax.org/browse/term/HP:0008944","HPO_Synonym__c":"Lower leg amyotrophy; Lower limb degeneration; Muscle atrophy, lower limb, distal","HPO_Name__c":"Distal lower limb amyotrophy","Feature_System__c":"Musculoskeletal System","HPO_Feature_Type__c":"Symptom"}},{"Provided_By__c":"ORPHA:466768","HPO_Frequency__c":"Uncommon (<1-4%)","Feature__r":{"HPO_Description__c":"Loss of the ability to control the urinary bladder leading to involuntary urination.","HPO_Feature_URL__c":"https://hpo.jax.org/browse/term/HP:0000020","HPO_Synonym__c":"Bladder incontinence; Loss of bladder control","HPO_Name__c":"Urinary incontinence","HPO_Feature_Type__c":"Symptom"}},{"Provided_By__c":"ORPHA:466768","HPO_Frequency__c":"Occasional (5-29%)","Feature__r":{"HPO_Description__c":"A lack of strength of the proximal muscles of the legs.","HPO_Feature_URL__c":"https://hpo.jax.org/browse/term/HP:0008994","HPO_Synonym__c":"Muscle weakness, proximal, lower limbs; Proximal muscle weakness in lower limbs","HPO_Name__c":"Proximal lower limb muscle weakness","Feature_System__c":"Musculoskeletal System","HPO_Feature_Type__c":"Symptom"}},{"Provided_By__c":"ORPHA:466768","HPO_Frequency__c":"Uncommon (<1-4%)","Feature__r":{"HPO_Description__c":"Head circumference below 2 standard deviations below the mean for age and sex.","HPO_Feature_URL__c":"https://hpo.jax.org/browse/term/HP:0000252","HPO_Synonym__c":"Abnormally small cranium; Abnormally small skull; Decreased circumference of cranium; Decreased size of cranium; Decreased size of skull; Reduced head circumference; small cranium; Small head circumference","HPO_Name__c":"Microcephaly","Feature_System__c":"Nervous System; Musculoskeletal System","HPO_Feature_Type__c":"Symptom"}},{"Provided_By__c":"ORPHA:466768","HPO_Frequency__c":"Frequent (30-79%)","Feature__r":{"HPO_Description__c":"Progressive impairment of function of motor axons with muscle weakness, atrophy, and cramps. The deficits are length-dependent, meaning that muscles innervated by the longest nerves are affected first, so that for instance the arms are affected at a later age than the onset of deficits involving the lower leg.","HPO_Feature_URL__c":"https://hpo.jax.org/browse/term/HP:0007002","HPO_Name__c":"Motor axonal neuropathy","Feature_System__c":"Nervous System","HPO_Feature_Type__c":"Symptom"}},{"Provided_By__c":"ORPHA:466768","HPO_Frequency__c":"Occasional (5-29%)","Feature__r":{"HPO_Description__c":"An abnormality in the sound (volume) or cadence (rate) of speech.","HPO_Feature_URL__c":"https://hpo.jax.org/browse/term/HP:0002167","HPO_Synonym__c":"Abnormal speech; Abnormal vocalization; Abnormality of speech or vocalization","HPO_Name__c":"Abnormal speech pattern","Feature_System__c":"Nervous System","HPO_Feature_Type__c":"Symptom"}},{"Provided_By__c":"ORPHA:466768","HPO_Frequency__c":"Occasional (5-29%)","Feature__r":{"HPO_Description__c":"Generalized weakness or decreased strength of the muscles, affecting both distal and proximal musculature.","HPO_Feature_URL__c":"https://hpo.jax.org/browse/term/HP:0003324","HPO_Synonym__c":"Generalized weakness; Muscle weakness, diffuse; Muscle weakness, generalized","HPO_Name__c":"Generalized muscle weakness","Feature_System__c":"Musculoskeletal System","HPO_Feature_Type__c":"Symptom"}},{"Provided_By__c":"ORPHA:466768","HPO_Frequency__c":"Frequent (30-79%)","Feature__r":{"HPO_Description__c":"An unintentional, oscillating to-and-fro muscle movement about a joint axis.","HPO_Feature_URL__c":"https://hpo.jax.org/browse/term/HP:0001337","HPO_Synonym__c":"Tremor; Tremors","HPO_Name__c":"Tremor","Feature_System__c":"Nervous System","HPO_Feature_Type__c":"Symptom"}},{"Provided_By__c":"ORPHA:466768","HPO_Frequency__c":"Occasional (5-29%)","Feature__r":{"HPO_Description__c":"Decreased strength of the neck musculature.","HPO_Feature_URL__c":"https://hpo.jax.org/browse/term/HP:0000467","HPO_Synonym__c":"Floppy neck; Neck muscle weakness","HPO_Name__c":"Neck muscle weakness","Feature_System__c":"Musculoskeletal System","HPO_Feature_Type__c":"Symptom"}},{"Provided_By__c":"ORPHA:466768","HPO_Frequency__c":"Very frequent (80-99%)","Feature__r":{"HPO_Description__c":"Muscular atrophy affecting the lower limb.","HPO_Feature_URL__c":"https://hpo.jax.org/browse/term/HP:0007210","HPO_Name__c":"Lower limb amyotrophy","Feature_System__c":"Musculoskeletal System","HPO_Feature_Type__c":"Symptom"}},{"Provided_By__c":"ORPHA:466768","HPO_Frequency__c":"Uncommon (<1-4%)","Feature__r":{"HPO_Description__c":"The presence of a paralyzed diaphragm.","HPO_Feature_URL__c":"https://hpo.jax.org/browse/term/HP:0006597","HPO_Synonym__c":"Diaphragmatic paralysis; Paralyzed diaphragm","HPO_Name__c":"Diaphragmatic paralysis","Feature_System__c":"Nervous System; Musculoskeletal System","HPO_Feature_Type__c":"Symptom"}},{"Provided_By__c":"ORPHA:466768","HPO_Frequency__c":"Occasional (5-29%)","Feature__r":{"HPO_Description__c":"Fasciculations are observed as small, local, involuntary muscle contractions (twitching) visible under the skin. Fasciculations result from increased irritability of an axon (which in turn is often a manifestation of disease of a motor neuron). This leads to sporadic discharges of all the muscle fibers controlled by the axon in isolation from other motor units.","HPO_Feature_URL__c":"https://hpo.jax.org/browse/term/HP:0002380","HPO_Synonym__c":"Fasciculation; Muscle fasciculation; Muscle twitch","HPO_Name__c":"Fasciculations","Feature_System__c":"Nervous System","HPO_Feature_Type__c":"Symptom"}},{"Provided_By__c":"ORPHA:466768","HPO_Frequency__c":"Frequent (30-79%)","Feature__r":{"HPO_Description__c":"A decrease in the ability to perceive vibration. Clinically, this is usually tested with a tuning fork which vibrates at 128 Hz and is applied to bony prominences such as the malleoli at the ankles or the metacarpal-phalangeal joints. There is a slow decay of vibration from the tuning fork. The degree of vibratory sense loss can be crudely estimated by counting the number of seconds that the examiner can perceive the vibration longer than the patient.","HPO_Feature_URL__c":"https://hpo.jax.org/browse/term/HP:0002495","HPO_Synonym__c":"Decreased vibration sense; Decreased vibratory sense; Diminished vibratory sense; Hypopallesthesia; Impaired vibratory sensation; Impaired vibratory sense","HPO_Name__c":"Impaired vibratory sensation","Feature_System__c":"Nervous System","HPO_Feature_Type__c":"Symptom"}},{"Provided_By__c":"ORPHA:466768","HPO_Frequency__c":"Occasional (5-29%)","Feature__r":{"HPO_Description__c":"Wasting of the tongue.","HPO_Feature_URL__c":"https://hpo.jax.org/browse/term/HP:0012473","HPO_Synonym__c":"Atrophy of the tongue; Lingual atrophy; Lingual wasting; Wasting of the tongue","HPO_Name__c":"Tongue atrophy","HPO_Feature_Type__c":"Symptom"}},{"Provided_By__c":"ORPHA:466768","HPO_Frequency__c":"Occasional (5-29%)","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":"ORPHA:466768","HPO_Frequency__c":"Frequent (30-79%)","Feature__r":{"HPO_Feature_URL__c":"https://hpo.jax.org/browse/term/HP:0004302","HPO_Synonym__c":"Functional motor problems","HPO_Name__c":"Functional motor deficit","Feature_System__c":"Musculoskeletal System","HPO_Feature_Type__c":"Symptom"}},{"Provided_By__c":"ORPHA:466768","HPO_Frequency__c":"Uncommon (<1-4%)","Feature__r":{"HPO_Description__c":"Cerebellar atrophy is defined as a cerebellum with initially normal structures, in a posterior fossa with normal size, which displays enlarged fissures (interfolial spaces) in comparison to the foliae secondary to loss of tissue. Cerebellar atrophy implies irreversible loss of tissue and result from an ongoing progressive disease until a final stage is reached or a single injury, e.g. an intoxication or infectious event.","HPO_Feature_URL__c":"https://hpo.jax.org/browse/term/HP:0001272","HPO_Synonym__c":"Atrophic cerebellum; Degeneration of cerebellum","HPO_Name__c":"Cerebellar atrophy","Feature_System__c":"Nervous System","HPO_Feature_Type__c":"Symptom"}},{"Provided_By__c":"ORPHA:466768","HPO_Frequency__c":"Frequent (30-79%)","Feature__r":{"HPO_Description__c":"An abnormality of the myelination of motor and sensory peripheral nerves. These are axons for motor nerves and dendrites for sensory nerves in the strict anatomic sense.","HPO_Feature_URL__c":"https://hpo.jax.org/browse/term/HP:0003130","HPO_Name__c":"Abnormal peripheral myelination","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":["autosomal dominant axonal charcot-marie-tooth disease type 2z"," autosomal dominant charcot-marie-tooth disease type 2 due to morc2 (morc family cw-type zinc finger 2) mutation"," autosomal dominant charcot-marie-tooth disease type 2 due to morc2 mutation"," autosomal dominant charcot-marie-tooth disease type 2z"," charcot-marie-tooth disease caused by mutation in morc2"," charcot-marie-tooth disease, axonal, autosomal dominant, type 2z"," charcot-marie-tooth disease, axonal, type 2z"," charcot-marie-tooth neuropathy type 2z"," charcot-marie-tooth neuropathy, type 2z"," cmt2z"," morc2 charcot-marie-tooth disease"]}