{"Name":"Autosomal recessive axonal neuropathy with neuromyotonia","DiseaseID__c":"GARD:0012353","id":12353,"encodedName":"autosomal-recessive-axonal-neuropathy-with-neuromyotonia","IsDeleted":false,"Disease_Name_Full__c":"Autosomal recessive axonal neuropathy with neuromyotonia","Xref_IDs__c":"711406009; C5700127; DOID:0050526; MEDGEN:1814513; MONDO:0007646; OMIM:137200; ORPHA:324442","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":1,"World_Estimate__c":"1 to 8,000","No_of_HRSA_records__c":0,"Evidence_Based_Score__c":1,"No_of_Disease_Descriptions__c":4,"Disease_Characteristics_Score__c":8,"No_of_Age_at_Onset__c":1,"Description_Source__c":"MONDO:0007646","Disease_Description__c":"A rare peripheral neuropathy characterized by slowly progressive axonal, motor greater than sensory, polyneuropathy combined with neuromytonia (including spontaneous muscular activity at rest (myokymia), impaired muscle relaxation (pseudomyotonia), and contractures of hands and feet) and neuromyotonic or myokymic discharges on needle EMG. It presents with distal lower limb weakness with gait impairment, muscle stiffness, fasciculations and cramps in hands and legs worsened by cold, decreased to absent tendon reflexes, intrinsic hand muscle atrophy and, variably, mild distal sensory impairment.","GARD_Name__c":"Autosomal recessive axonal neuropathy with neuromyotonia","GARD_Synonym__c":"aran-nm; arcmt2-nm; autosomal recessive charcot-marie-tooth disease type 2 with neuromyotonia; autosomal recessive neuromyotonia and axonal neuropathy; autosomal recessive neuromyotonia with axonal neuropathy; gamstorp-wohlfart syndrome; myokymia, myotonia and muscle wasting; myokymia, myotonia, and muscle wasting; neuromyotonia and axonal neuropathy, autosomal recessive; nman","Curated_Disease_Description_Source__c":"MONDO:0007646","Curated_Disease_Description__c":"Autosomal recessive axonal neuropathy with neuromyotonia is a disorder that affects the peripheral nerves. Peripheral nerves connect the brain and spinal cord to muscles and to sensory cells that detect sensations such as touch, pain, heat, and sound. Axonal neuropathy, a characteristic feature of this condition, is caused by damage to a particular part of peripheral nerves called axons, which are the extensions of nerve cells (neurons) that transmit nerve impulses. In people with autosomal recessive axonal neuropathy with neuromyotonia, the damage primarily causes progressive weakness and wasting (atrophy) of muscles in the feet, legs, and hands. Muscle weakness may be especially apparent during exercise (exercise intolerance) and can lead to an unusual walking style (gait), frequent falls, and joint deformities (contractures) in the hands and feet. In some affected individuals, axonal neuropathy also causes decreased sensitivity to touch, heat, or cold, particularly in the lower arms or legs. Another feature of this condition is neuromyotonia (also known as Isaac syndrome). Neuromyotonia results from overactivation (hyperexcitability) of peripheral nerves, which leads to delayed relaxation of muscles after voluntary tensing (contraction), muscle cramps, and involuntary rippling movement of the muscles (myokymia).","Curated_USA_Estimate_Source__c":null,"Curated_USA_Estimate__c":"1,000","Age_at_Onset_Snippet_Text__c":"as a Child","SourceID__c":"ORPHA:324442","Deprecated__c":"No","Disease_Concept_Type__c":"Rare Disease Entity","MONDO_ID__c":"MONDO:0007646","ORPHANET_ID__c":"ORPHA:324442","Replaced_By_ID__c":null,"Display_Spanish_Disease_Name__c":"Neuropatía axonal autosómica recesiva con neuromiotonía","Spanish_Description_Source__c":"ORPHA:324442","Spanish_Description__c":"Es una neuropatía periférica poco frecuente caracterizada por polineuropatía axonal de progresión lenta, motora más que sensitiva, combinada con neuromiotonía (que incluye actividad muscular espontánea en reposo (mioquimia), relajación muscular alterada (pseudomiotonía) y contracturas en manos y pies), así como descargas neuromiotónicas o mioquímicas en la EMG con aguja. Presenta debilidad distal en las extremidades inferiores con alteración de la marcha, rigidez muscular, fasciculaciones y calambres en manos y piernas que empeoran con el frío, reflejos tendinosos de reducidos a ausentes, atrofia intrínseca de la musculatura de la mano y, de forma variable, leve afectación sensitiva distal.","Spanish_Disease_Name__c":"neuropatía axonal autosómica recesiva con neuromiotonía","Spanish_GARD_Synonym__c":"aran-nm; arcmt2-nm; enfermedad de charcot-marie-tooth autosómica recesiva tipo 2 con neuromiotonía","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":"Autosomal recessive axonal neuropathy with neuromyotonia is a disorder that affects the peripheral nerves. Peripheral nerves connect the brain and spinal cord to muscles and to sensory cells that detect sensations such as touch, pain, heat, and sound. Axonal neuropathy, a characteristic feature of this condition, is caused by damage to a particular part of peripheral nerves called axons, which are the extensions of nerve cells (neurons) that transmit nerve impulses. In people with autosomal recessive axonal neuropathy with neuromyotonia, the damage primarily causes progressive weakness and wasting (atrophy) of muscles in the feet, legs, and hands. Muscle weakness may be especially apparent during exercise (exercise intolerance) and can lead to an unusual walking style (gait), frequent falls, and joint deformities (contractures) in the hands and feet. In some affected individuals, axonal neuropathy also causes decreased sensitivity to touch, heat, or cold, particularly in the lower arms or legs. Another feature of this condition is neuromyotonia (also known as Isaac syndrome). Neuromyotonia results from overactivation (hyperexcitability) of peripheral nerves, which leads to delayed relaxation of muscles after voluntary tensing (contraction), muscle cramps, and involuntary rippling movement of the muscles (myokymia).","Curated_Disease_Description_Source__c":"MONDO:0007646","GARD_Synonym__c":"aran-nm; arcmt2-nm; autosomal recessive charcot-marie-tooth disease type 2 with neuromyotonia; autosomal recessive neuromyotonia and axonal neuropathy; autosomal recessive neuromyotonia with axonal neuropathy; gamstorp-wohlfart syndrome; myokymia, myotonia and muscle wasting; myokymia, myotonia, and muscle wasting; neuromyotonia and axonal neuropathy, autosomal recessive; nman","Name":"Autosomal recessive axonal neuropathy with neuromyotonia","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 Australia Inc.","Website__c":"https://www.cmt.org.au"},{"Account_Name__c":"Charcot-Marie-Tooth Association","Website__c":"https://www.cmtausa.org/"},{"Account_Name__c":"Charcot-Marie-Tooth UK","Website__c":"https://www.cmt.org.uk/"}],"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":"Pediatrics","Tag_Category__c":"Specialist"}],"Age_At_Onset__c":[{"Age_At_Onset__c":"Childhood","Provided_By__c":"ORPHA:324442"}],"Diagnosis__c":[{"Type__c":"GTR","Curie__c":"MEDGEN:CN074193"}],"External_Identifier_Disease__c":[{"URL__c":"https://raresource.nih.gov/diseases/filter/0012353","Source__c":"RareSource"},{"URL__c":"https://uts.nlm.nih.gov/uts/umls/concept/C5700127","Source__c":"C5700127","Xref__c":"C5700127"},{"URL__c":"https://www.ebi.ac.uk/ols4/ontologies/doid/classes?obo_id=DOID%3A0050526","Source__c":"MONDO:0007646","Xref__c":"DOID:0050526"},{"URL__c":"https://browser.ihtsdotools.org/?perspective=full&conceptId1=711406009","Source__c":"C5700127; MONDO:0007646","Xref__c":"711406009"},{"URL__c":"https://www.orpha.net/en/disease/detail/324442","Source__c":"C5700127; MONDO:0007646; ORPHA:324442","Xref__c":"ORPHA:324442"},{"URL__c":"https://www.omim.org/entry/137200","Source__c":"C5700127; MONDO:0007646; ORPHA:324442","Xref__c":"OMIM:137200"},{"URL__c":"https://www.ncbi.nlm.nih.gov/medgen/?term=1814513","Source__c":"C5700127","Xref__c":"MEDGEN:1814513"},{"URL__c":"http://purl.obolibrary.org/obo/MONDO_0007646","Source__c":"GARD:0012353","Xref__c":"MONDO:0007646"},{"URL__c":"https://medlineplus.gov/genetics/condition/autosomal-recessive-axonal-neuropathy-with-neuromyotonia","Source__c":"GARD:0012353","Xref__c":"https://medlineplus.gov/genetics/condition/autosomal-recessive-axonal-neuropathy-with-neuromyotonia"}],"GARD_Disease_Gene__c":[{"GeneSymbol__c":"HINT1","GHR_URL__c":"https://medlineplus.gov/genetics/gene/hint1","Gene_Type__c":"protein-coding gene","Causal_Gene__c":true}],"Inheritance__c":["Autosomal recessive"],"GARD_Disease_Feature__c":[{"Provided_By__c":"ORPHA:324442","HPO_Frequency__c":"Occasional (5-29%)","Feature__r":{"HPO_Description__c":"A focal dystonia of the fingers, hand, and/or forearm that appears when the affected person attempts to do a task that requires fine motor movements such as writing or playing a musical instrument.","HPO_Feature_URL__c":"https://hpo.jax.org/browse/term/HP:0002356","HPO_Synonym__c":"Writer's cramp","HPO_Name__c":"Writer's cramp","Feature_System__c":"Nervous System","HPO_Feature_Type__c":"Symptom"}},{"Provided_By__c":"ORPHA:324442","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:324442","HPO_Frequency__c":"Occasional (5-29%)","Feature__r":{"HPO_Description__c":"Weakness of all four limbs.","HPO_Feature_URL__c":"https://hpo.jax.org/browse/term/HP:0002273","HPO_Synonym__c":"Quadriparesis","HPO_Name__c":"Tetraparesis","Feature_System__c":"Nervous System","HPO_Feature_Type__c":"Symptom"}},{"Provided_By__c":"ORPHA:324442","HPO_Frequency__c":"Occasional (5-29%)","Feature__r":{"HPO_Description__c":"Reduced ability to sense pain, temperature, touch, vibration stimuli in the distal regions of the extremities.","HPO_Feature_URL__c":"https://hpo.jax.org/browse/term/HP:0003409","HPO_Synonym__c":"Distal sensory loss to all modalities","HPO_Name__c":"Distal sensory impairment of all modalities","Feature_System__c":"Nervous System","HPO_Feature_Type__c":"Symptom"}},{"Provided_By__c":"ORPHA:324442","HPO_Frequency__c":"Frequent (30-79%)","Feature__r":{"HPO_Description__c":"Fasciculations affecting the musculature of the arms and legs.","HPO_Feature_URL__c":"https://hpo.jax.org/browse/term/HP:0007289","HPO_Synonym__c":"Limb fasciculation","HPO_Name__c":"Limb fasciculations","Feature_System__c":"Nervous System","HPO_Feature_Type__c":"Symptom"}},{"Provided_By__c":"ORPHA:324442","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:324442","HPO_Frequency__c":"Occasional (5-29%)","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":"ORPHA:324442","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:324442","HPO_Frequency__c":"Occasional (5-29%)","Feature__r":{"HPO_Description__c":"A condition in which muscles cannot be moved quickly without accompanying pain or spasm.","HPO_Feature_URL__c":"https://hpo.jax.org/browse/term/HP:0003552","HPO_Name__c":"Muscle stiffness","Feature_System__c":"Musculoskeletal System","HPO_Feature_Type__c":"Symptom"}},{"Provided_By__c":"ORPHA:324442","HPO_Frequency__c":"Occasional (5-29%)","Feature__r":{"HPO_Description__c":"Mechanical percussion (i.e., striking a muscle with a reflex hammer) leads to spreading waves of muscle contractions that begin proximally and spread laterally across the muscle.","HPO_Feature_URL__c":"https://hpo.jax.org/browse/term/HP:0003760","HPO_Name__c":"Percussion-induced rapid rolling muscle contractions","Feature_System__c":"Musculoskeletal System","HPO_Feature_Type__c":"Symptom"}},{"Provided_By__c":"ORPHA:324442","HPO_Frequency__c":"Occasional (5-29%)","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:324442","HPO_Frequency__c":"Frequent (30-79%)","Feature__r":{"HPO_Description__c":"A functional motor deficit where individuals whose responses to the challenges of exercise fail to achieve levels considered normal for their age and sex.","HPO_Feature_URL__c":"https://hpo.jax.org/browse/term/HP:0003546","HPO_Synonym__c":"Decreased ability to exercise; Inability to exercise; Low exercise endurance; Poor exercise tolerance","HPO_Name__c":"Exercise intolerance","HPO_Feature_Type__c":"Symptom"}},{"Provided_By__c":"ORPHA:324442","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":"ORPHA:324442","HPO_Frequency__c":"Frequent (30-79%)","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:324442","HPO_Frequency__c":"Frequent (30-79%)","Feature__r":{"HPO_Description__c":"An abnormality of the skeleton of foot.","HPO_Feature_URL__c":"https://hpo.jax.org/browse/term/HP:0001760","HPO_Synonym__c":"Abnormal feet structure; Abnormality of the feet; Abnormality of the foot; Foot deformities; Foot deformity","HPO_Name__c":"Abnormal foot morphology","HPO_Feature_Type__c":"Symptom"}},{"Provided_By__c":"ORPHA:324442","HPO_Frequency__c":"Occasional (5-29%)","Feature__r":{"HPO_Description__c":"Inability to walk in a person who previous had the ability to walk.","HPO_Feature_URL__c":"https://hpo.jax.org/browse/term/HP:0002505","HPO_Synonym__c":"Loss of ability to walk","HPO_Name__c":"Loss of ambulation","Feature_System__c":"Nervous System","HPO_Feature_Type__c":"Symptom"}},{"Provided_By__c":"ORPHA:324442","HPO_Frequency__c":"Very frequent (80-99%)","Feature__r":{"HPO_Description__c":"Evidence of chronic denervation on electromyography.","HPO_Feature_URL__c":"https://hpo.jax.org/browse/term/HP:0003444","HPO_Name__c":"EMG: chronic denervation signs","Feature_System__c":"Musculoskeletal System","HPO_Feature_Type__c":"Procedure_EMG"}},{"Provided_By__c":"ORPHA:324442","HPO_Frequency__c":"Occasional (5-29%)","Feature__r":{"HPO_Description__c":"Muscular atrophy involving the muscles of the hand.","HPO_Feature_URL__c":"https://hpo.jax.org/browse/term/HP:0009130","HPO_Synonym__c":"Amyotrophy involving the musculature of the hand; Amyotrophy of hand muscles; Hand muscle degeneration; Hand muscle wasting; Hand muscle wasting, bilateral","HPO_Name__c":"Hand muscle atrophy","Feature_System__c":"Musculoskeletal System","HPO_Feature_Type__c":"Symptom"}},{"Provided_By__c":"ORPHA:324442","HPO_Frequency__c":"Uncommon (<1-4%)","Feature__r":{"HPO_Feature_URL__c":"https://hpo.jax.org/browse/term/HP:0002943","HPO_Name__c":"Thoracic scoliosis","Feature_System__c":"Musculoskeletal System","HPO_Feature_Type__c":"Symptom"}},{"Provided_By__c":"ORPHA:324442","HPO_Frequency__c":"Frequent (30-79%)","Feature__r":{"HPO_Description__c":"Difficulty releasing one's grip associated with prolonged first handgrip relaxation times.","HPO_Feature_URL__c":"https://hpo.jax.org/browse/term/HP:0012899","HPO_Synonym__c":"Grip myotonia","HPO_Name__c":"Handgrip myotonia","Feature_System__c":"Musculoskeletal System","HPO_Feature_Type__c":"Symptom"}},{"Provided_By__c":"ORPHA:324442","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:324442","HPO_Frequency__c":"Uncommon (<1-4%)","Feature__r":{"HPO_Description__c":"Underdevelopment of the Third metatarsal bone leading to a short (hypoplastic) third metatarsal bone.","HPO_Feature_URL__c":"https://hpo.jax.org/browse/term/HP:0004686","HPO_Synonym__c":"Hypoplasia of the 3rd metatarsal bone; Short 3rd long bone of foot","HPO_Name__c":"Short third metatarsal","Feature_System__c":"Musculoskeletal System","HPO_Feature_Type__c":"Symptom"}},{"Provided_By__c":"ORPHA:324442","HPO_Frequency__c":"Occasional (5-29%)","Feature__r":{"HPO_Feature_URL__c":"https://hpo.jax.org/browse/term/HP:0009077","HPO_Name__c":"Weakness of long finger extensor muscles","Feature_System__c":"Musculoskeletal System","HPO_Feature_Type__c":"Symptom"}},{"Provided_By__c":"ORPHA:324442","HPO_Frequency__c":"Occasional (5-29%)","Feature__r":{"HPO_Description__c":"Atrophy of the intrinsic muscle groups of the hand, comprising the thenar and hypothenar muscles; the interossei muscles; and the lumbrical muscles.","HPO_Feature_URL__c":"https://hpo.jax.org/browse/term/HP:0008954","HPO_Name__c":"Intrinsic hand muscle atrophy","Feature_System__c":"Musculoskeletal System","HPO_Feature_Type__c":"Symptom"}},{"Provided_By__c":"ORPHA:324442","HPO_Frequency__c":"Frequent (30-79%)","Feature__r":{"HPO_Description__c":"An elevation of the level of the enzyme creatine kinase (also known as creatine phosphokinase (CK; EC 2.7.3.2) in the blood. CK levels can be elevated in a number of clinical disorders such as myocardial infarction, rhabdomyolysis, and muscular dystrophy.","HPO_Feature_URL__c":"https://hpo.jax.org/browse/term/HP:0003236","HPO_Synonym__c":"Elevated blood creatine phosphokinase; Elevated circulating creatine phosphokinase; Elevated creatine kinase; Elevated serum CPK; Elevated serum creatine kinase; Elevated serum creatine phosphokinase; High serum creatine kinase; Increased CPK; Increased creatine kinase; Increased creatine phosphokinase; Increased serum CK; Increased serum creatine kinase; Increased serum creatine phosphokinase","HPO_Name__c":"Elevated circulating creatine kinase concentration","HPO_Feature_Type__c":"Lab"}},{"Provided_By__c":"ORPHA:324442","HPO_Frequency__c":"Frequent (30-79%)","Feature__r":{"HPO_Feature_URL__c":"https://hpo.jax.org/browse/term/HP:0007178","HPO_Synonym__c":"Peripheral motor neuropathy","HPO_Name__c":"Motor polyneuropathy","Feature_System__c":"Nervous System","HPO_Feature_Type__c":"Symptom"}},{"Provided_By__c":"ORPHA:324442","HPO_Frequency__c":"Occasional (5-29%)","Feature__r":{"HPO_Description__c":"A decrease in the ability to perceive vibration in the legs.","HPO_Feature_URL__c":"https://hpo.jax.org/browse/term/HP:0002166","HPO_Synonym__c":"Decreased lower limb vibratory sense; Decreased vibratory sense in lower limbs; Decreased vibratory sense in the lower extremities; Decreased vibratory sense in the lower limbs; Diminished vibratory sensation in the legs; Distal sensory loss, especially vibratory sense; Distal vibratory impairment of the lower limbs; Impaired vibration sensation in the lower limbs","HPO_Name__c":"Impaired vibration sensation in the lower limbs","Feature_System__c":"Nervous System","HPO_Feature_Type__c":"Symptom"}},{"Provided_By__c":"ORPHA:324442","HPO_Frequency__c":"Occasional (5-29%)","Feature__r":{"HPO_Description__c":"Atrophy of the peroneous muscles, peroneus longus (also known as Fibularis longus), Peroneus brevis (also known as fibularis brevis, and Peroneus tertius (also known as fibularis tertius).","HPO_Feature_URL__c":"https://hpo.jax.org/browse/term/HP:0009049","HPO_Synonym__c":"Peroneal atrophy","HPO_Name__c":"Peroneal muscle atrophy","Feature_System__c":"Musculoskeletal System","HPO_Feature_Type__c":"Symptom"}},{"Provided_By__c":"ORPHA:324442","HPO_Frequency__c":"Uncommon (<1-4%)","Feature__r":{"HPO_Description__c":"Mild intellectual disability (ID) is defined as a type of ID characterized by mildly sub-average adaptive functioning and intellectual functioning, with an intelligence quotient (IQ) the range of 50-69.","HPO_Feature_URL__c":"https://hpo.jax.org/browse/term/HP:0001256","HPO_Synonym__c":"Intellectual disability, mild; Mental retardation, borderline-mild; Mild and nonprogressive mental retardation; Mild mental retardation","HPO_Name__c":"Mild intellectual disability","Feature_System__c":"Nervous System","HPO_Feature_Type__c":"Symptom"}},{"Provided_By__c":"ORPHA:324442","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":"ORPHA:324442","HPO_Frequency__c":"Very frequent (80-99%)","Feature__r":{"HPO_Description__c":"An involuntary and painless delay in the relaxation of skeletal muscle following contraction or electrical stimulation.","HPO_Feature_URL__c":"https://hpo.jax.org/browse/term/HP:0002486","HPO_Synonym__c":"Delayed relaxation of muscle fibers after contraction","HPO_Name__c":"Myotonia","Feature_System__c":"Musculoskeletal System","HPO_Feature_Type__c":"Symptom"}},{"Provided_By__c":"ORPHA:324442","HPO_Frequency__c":"Uncommon (<1-4%)","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:324442","HPO_Frequency__c":"Frequent (30-79%)","Feature__r":{"HPO_Description__c":"A type of weakness of a skeletal muscle of distal part of a limb that occurs after a muscle group is used and lessens if the muscle group has some rest. That is, there is diminution of strength with repetitive muscle actions.","HPO_Feature_URL__c":"https://hpo.jax.org/browse/term/HP:0030198","HPO_Name__c":"Fatigable weakness of distal limb muscles","Feature_System__c":"Nervous System; Musculoskeletal System","HPO_Feature_Type__c":"Symptom"}},{"Provided_By__c":"ORPHA:324442","HPO_Frequency__c":"Occasional (5-29%)","Feature__r":{"HPO_Feature_URL__c":"https://hpo.jax.org/browse/term/HP:0009005","HPO_Name__c":"Weakness of the intrinsic hand muscles","Feature_System__c":"Musculoskeletal System","HPO_Feature_Type__c":"Symptom"}},{"Provided_By__c":"ORPHA:324442","HPO_Frequency__c":"Uncommon (<1-4%)","Feature__r":{"HPO_Description__c":"A condition in which middle parts of the hand (fingers and metacarpals) are missing giving a cleft appearance. The severity is very variable ranging from slightly hypoplastic middle fingers over absent middle fingers as far as oligo- or monodactyl hands.","HPO_Feature_URL__c":"https://hpo.jax.org/browse/term/HP:0001171","HPO_Synonym__c":"Ectrodactyly of the hand; Hand ectrodactyly; Split hand; Split-hand","HPO_Name__c":"Split hand","Feature_System__c":"Musculoskeletal System","HPO_Feature_Type__c":"Symptom"}},{"Provided_By__c":"ORPHA:324442","HPO_Frequency__c":"Frequent (30-79%)","Feature__r":{"HPO_Description__c":"Sudden and involuntary contractions of one or more muscles brought on by physical exertion.","HPO_Feature_URL__c":"https://hpo.jax.org/browse/term/HP:0003710","HPO_Synonym__c":"Exercise-induced muscle cramping; Exercise-induced muscle cramps; Muscle cramps following exercise; Muscle cramps on exercise; Muscle cramps on exertion; Muscle cramps with exertion","HPO_Name__c":"Exercise-induced muscle cramps","Feature_System__c":"Musculoskeletal System","HPO_Feature_Type__c":"Symptom"}},{"Provided_By__c":"ORPHA:324442","HPO_Frequency__c":"Very frequent (80-99%)","Feature__r":{"HPO_Description__c":"Myokymia consists of involuntary, fine, continuous, undulating contractions that spread across the affected striated muscle.","HPO_Feature_URL__c":"https://hpo.jax.org/browse/term/HP:0002411","HPO_Name__c":"Myokymia","Feature_System__c":"Nervous System","HPO_Feature_Type__c":"Symptom"}},{"Provided_By__c":"ORPHA:324442","HPO_Frequency__c":"Uncommon (<1-4%)","Feature__r":{"HPO_Description__c":"The distal interphalangeal joint and/or the proximal interphalangeal joint of the fingers cannot be extended to 180 degrees by either active or passive extension.","HPO_Feature_URL__c":"https://hpo.jax.org/browse/term/HP:0100490","HPO_Synonym__c":"Camptodactyly of hands; Camptodactyly of proximal interphalangeal joint; Contractures of the proximal interphalangeal joints of the fingers; Flexion contractures of proximal interphalangeal joints; Permanent flexion of the finger; Proximal interphalangeal finger joint contractures","HPO_Name__c":"Camptodactyly of finger","Feature_System__c":"Musculoskeletal System","HPO_Feature_Type__c":"Symptom"}},{"Provided_By__c":"ORPHA:324442","HPO_Frequency__c":"Occasional (5-29%)","Feature__r":{"HPO_Description__c":"Abnormal sensations such as tingling, pricking, or numbness of the skin with no apparent physical cause.","HPO_Feature_URL__c":"https://hpo.jax.org/browse/term/HP:0003401","HPO_Synonym__c":"Paresthesias; Pins and needles feeling; Tingling","HPO_Name__c":"Paresthesia","Feature_System__c":"Nervous System","HPO_Feature_Type__c":"Symptom"}},{"Provided_By__c":"ORPHA:324442","HPO_Frequency__c":"Occasional (5-29%)","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:324442","HPO_Frequency__c":"Very frequent (80-99%)","Feature__r":{"HPO_Description__c":"The presence of spontaneous bursts of rapidly firing potentials that recur at regular intervals of 2-10 per second and are unaffected by voluntary effort. This is an electromyographic (EMG) finding.","HPO_Feature_URL__c":"https://hpo.jax.org/browse/term/HP:0100288","HPO_Name__c":"EMG: myokymic discharges","Feature_System__c":"Nervous System; Musculoskeletal System","HPO_Feature_Type__c":"Procedure_EMG"}},{"Provided_By__c":"ORPHA:324442","HPO_Frequency__c":"Occasional (5-29%)","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:324442","HPO_Frequency__c":"Uncommon (<1-4%)","Feature__r":{"HPO_Description__c":"Abnormal excessive perspiration (sweating) despite the lack of appropriate stimuli like hot and humid weather.","HPO_Feature_URL__c":"https://hpo.jax.org/browse/term/HP:0000975","HPO_Synonym__c":"Diaphoresis; Excessive sweating; Increased sweating; Profuse sweating; Sweating; Sweating profusely; Sweating, increased","HPO_Name__c":"Hyperhidrosis","Feature_System__c":"Skin System","HPO_Feature_Type__c":"Symptom"}},{"Provided_By__c":"ORPHA:324442","HPO_Frequency__c":"Occasional (5-29%)","Feature__r":{"HPO_Description__c":"Sudden and involuntary contractions of one or more muscles of the leg brought on by physical exertion.","HPO_Feature_URL__c":"https://hpo.jax.org/browse/term/HP:0008991","HPO_Name__c":"Exercise-induced leg cramps","Feature_System__c":"Musculoskeletal System","HPO_Feature_Type__c":"Symptom"}},{"Provided_By__c":"ORPHA:324442","HPO_Frequency__c":"Occasional (5-29%)","Feature__r":{"HPO_Description__c":"A flexion contracture is a bent (flexed) joint that cannot be straightened actively or passively. It is thus a chronic loss of joint motion due to structural changes in muscle, tendons, ligaments, or skin that prevents normal movement of joints.","HPO_Feature_URL__c":"https://hpo.jax.org/browse/term/HP:0001371","HPO_Synonym__c":"Flexed joint that cannot be straightened; Flexion contractures; Flexion contractures of joints","HPO_Name__c":"Flexion contracture","Feature_System__c":"Musculoskeletal System","HPO_Feature_Type__c":"Symptom"}},{"Provided_By__c":"ORPHA:324442","HPO_Frequency__c":"Occasional (5-29%)","Feature__r":{"HPO_Description__c":"A contracture of the Achilles tendon.","HPO_Feature_URL__c":"https://hpo.jax.org/browse/term/HP:0001771","HPO_Synonym__c":"Achilles tendon contractures; Contractures of the Achilles tendon; Shortening of the achilles tendon; Tight achilles tendon","HPO_Name__c":"Achilles tendon contracture","Feature_System__c":"Musculoskeletal System","HPO_Feature_Type__c":"Symptom"}},{"Provided_By__c":"ORPHA:324442","HPO_Frequency__c":"Occasional (5-29%)","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","Pediatrics"],"Account":["Peripheral Neuropathy"]},"synonyms":["aran-nm"," arcmt2-nm"," autosomal recessive charcot-marie-tooth disease type 2 with neuromyotonia"," autosomal recessive neuromyotonia and axonal neuropathy"," autosomal recessive neuromyotonia with axonal neuropathy"," gamstorp-wohlfart syndrome"," myokymia, myotonia and muscle wasting"," myokymia, myotonia, and muscle wasting"," neuromyotonia and axonal neuropathy, autosomal recessive"," nman"]}