{"Name":"Congenital myopathy with myasthenic-like onset","DiseaseID__c":"GARD:0021783","id":21783,"encodedName":"congenital-myopathy-with-myasthenic-like-onset","IsDeleted":false,"Disease_Name_Full__c":"Congenital myopathy with myasthenic-like onset","Xref_IDs__c":"763315005; C4706390; MEDGEN:1642781; MONDO:0018528; ORPHA:424107","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":7,"No_of_Age_at_Onset__c":2,"Description_Source__c":"MONDO:0018528","Disease_Description__c":"Congenital myopathy with myasthenic-like onset is a rare, genetic, non-dystrophic myopathy characterized by fatigable muscle weakness associated with congenital myopathy. Patients present with axial hypotonia, myopathic facies with fatigable ptosis, feeding difficulties, delayed gross motor development and proximal limb weakness with a RYR1-related typical pattern of muscle involvement (i.e. severe involvement of the soleus muscle and sparring of the rectus femoris, sartorius, gracilis and semitendinous muscles). Scoliosis and frequent respiratory tract infections are additional observed features.","GARD_Name__c":"Congenital myopathy with myasthenic-like onset","GARD_Synonym__c":null,"Curated_Disease_Description_Source__c":"MONDO:0018528","Curated_Disease_Description__c":"Congenital myopathy with myasthenic-like onset is a rare, genetic, non-dystrophic myopathy characterized by fatigable muscle weakness associated with congenital myopathy. Patients present with axial hypotonia, myopathic facies with fatigable ptosis, feeding difficulties, delayed gross motor development and proximal limb weakness with a RYR1-related typical pattern of muscle involvement (i.e. severe involvement of the soleus muscle and sparring of the rectus femoris, sartorius, gracilis and semitendinous muscles). Scoliosis and frequent respiratory tract infections are additional observed features.","Curated_USA_Estimate_Source__c":null,"Curated_USA_Estimate__c":"1,000","Age_at_Onset_Snippet_Text__c":"as a Newborn and as an Infant","SourceID__c":"ORPHA:424107","Deprecated__c":"No","Disease_Concept_Type__c":"Rare Disease Entity","MONDO_ID__c":"MONDO:0018528","ORPHANET_ID__c":"ORPHA:424107","Replaced_By_ID__c":null,"Display_Spanish_Disease_Name__c":"Miopatía congénita con inicio similar al miasténico","Spanish_Description_Source__c":"ORPHA:424107","Spanish_Description__c":"La miopatía congénita con inicio tipo miastenía es una miopatía genética, no distrófica, poco frecuente, caracterizada por debilidad muscular fatigable asociada a miopatía congénita. Los pacientes presentan hipotonía axial, facies miopáticas con ptosis fatigable, dificultades para alimentarse, retraso del desarrollo motor y debilidad proximal de las extremidades con un patrón típico de afectación muscular relacionado con RYR1 (es decir, compromiso grave del músculo sóleo y preservación de los músculos recto femoral, sartorio, grácilis y semitendinosos). Otras características observadas son escoliosis e infecciones frecuentes del tracto respiratorio.","Spanish_Disease_Name__c":"miopatía congénita con inicio similar al miasténico","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":"Congenital myopathy with myasthenic-like onset is a rare, genetic, non-dystrophic myopathy characterized by fatigable muscle weakness associated with congenital myopathy. Patients present with axial hypotonia, myopathic facies with fatigable ptosis, feeding difficulties, delayed gross motor development and proximal limb weakness with a RYR1-related typical pattern of muscle involvement (i.e. severe involvement of the soleus muscle and sparring of the rectus femoris, sartorius, gracilis and semitendinous muscles). Scoliosis and frequent respiratory tract infections are additional observed features.","Curated_Disease_Description_Source__c":"MONDO:0018528","Name":"Congenital myopathy with myasthenic-like onset","Curated_USA_Estimate__c":"1,000","estimateUsa":"1,000"}],"Organization_Supported_Diseases__c":[{"Account_Name__c":"RYR-1 Foundation","Website__c":"https://www.ryr1.org/"},{"Account_Name__c":"Muscular Dystrophy Association","Website__c":"https://www.mda.org"}],"GARD_Disease_Tag__c":[{"Tag_Name__c":"Genetics","Tag_Category__c":"Cause;Disease Category;Specialist","category_description":"Genetic diseases affect the DNA, or genetic instructions, which directs how tissues, organs, and body systems function.","curated_tag_name":"Genetic diseases"},{"Tag_Name__c":"Neurology","Tag_Category__c":"Disease Category;Specialist","category_description":"Neurological diseases affect the brain, spinal cord, cranial nerves, autonomic nerves, or other peripheral nerves.","curated_tag_name":"Neurological diseases"},{"Tag_Name__c":"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":"Neonatal","Provided_By__c":"ORPHA:424107"},{"Age_At_Onset__c":"Infancy","Provided_By__c":"ORPHA:424107"}],"External_Identifier_Disease__c":[{"URL__c":"https://uts.nlm.nih.gov/uts/umls/concept/C4706390","Source__c":"C4706390","Xref__c":"C4706390"},{"URL__c":"https://browser.ihtsdotools.org/?perspective=full&conceptId1=763315005","Source__c":"C4706390; MONDO:0018528","Xref__c":"763315005"},{"URL__c":"https://www.orpha.net/en/disease/detail/424107","Source__c":"C4706390; MONDO:0018528; ORPHA:424107","Xref__c":"ORPHA:424107"},{"URL__c":"https://www.ncbi.nlm.nih.gov/medgen/?term=1642781","Source__c":"C4706390","Xref__c":"MEDGEN:1642781"},{"URL__c":"http://purl.obolibrary.org/obo/MONDO_0018528","Source__c":"GARD:0021783","Xref__c":"MONDO:0018528"}],"GARD_Disease_Gene__c":[{"GeneSymbol__c":"RYR1","GHR_URL__c":"https://medlineplus.gov/genetics/gene/ryr1","Gene_Type__c":"protein-coding gene","Causal_Gene__c":true}],"Inheritance__c":["Autosomal recessive"],"GARD_Disease_Feature__c":[{"Provided_By__c":"ORPHA:424107","HPO_Frequency__c":"Frequent (30-79%)","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:424107","HPO_Frequency__c":"Very frequent (80-99%)","Feature__r":{"HPO_Description__c":"A type of weakness 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:0003473","HPO_Synonym__c":"Fatigable weakness of limb muscles; Generalized muscle weakness due to defect at the neuromuscular junction; Myasthenia; Myasthenic weakness; Proximal muscle weakness due to defect at the neuromuscular junction","HPO_Name__c":"Fatigable weakness","Feature_System__c":"Nervous System; Musculoskeletal System","HPO_Feature_Type__c":"Symptom"}},{"Provided_By__c":"ORPHA:424107","HPO_Frequency__c":"Frequent (30-79%)","Feature__r":{"HPO_Description__c":"The upper eyelid margin is positioned 3 mm or more lower than usual and covers the superior portion of the iris (objective); or, the upper lid margin obscures at least part of the pupil (subjective).","HPO_Feature_URL__c":"https://hpo.jax.org/browse/term/HP:0000508","HPO_Synonym__c":"Blepharoptosis; Drooping upper eyelid; Eyelid ptosis; Palpebral ptosis","HPO_Name__c":"Ptosis","HPO_Feature_Type__c":"Symptom"}},{"Provided_By__c":"ORPHA:424107","HPO_Frequency__c":"Frequent (30-79%)","Feature__r":{"HPO_Description__c":"Failure to thrive (FTT) refers to a child whose physical growth is substantially below the norm.","HPO_Feature_URL__c":"https://hpo.jax.org/browse/term/HP:0001508","HPO_Synonym__c":"Faltering weight; FTT; Postnatal failure to thrive; Weight faltering","HPO_Name__c":"Failure to thrive","HPO_Feature_Type__c":"Symptom"}},{"Provided_By__c":"ORPHA:424107","HPO_Frequency__c":"Frequent (30-79%)","Feature__r":{"HPO_Description__c":"Abnormal protrusion of the scapula away from the surface of the back.","HPO_Feature_URL__c":"https://hpo.jax.org/browse/term/HP:0003691","HPO_Synonym__c":"Scapula alata; Winged scapulae; Winged scapulas; Winged shoulder blade","HPO_Name__c":"Scapular winging","Feature_System__c":"Musculoskeletal System","HPO_Feature_Type__c":"Symptom"}},{"Provided_By__c":"ORPHA:424107","HPO_Frequency__c":"Frequent (30-79%)","Feature__r":{"HPO_Description__c":"Increased susceptibility to fatigue.","HPO_Feature_URL__c":"https://hpo.jax.org/browse/term/HP:0003388","HPO_Name__c":"Easy fatigability","Feature_System__c":"Nervous System; Musculoskeletal System","HPO_Feature_Type__c":"Symptom"}},{"Provided_By__c":"ORPHA:424107","HPO_Frequency__c":"Frequent (30-79%)","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:424107","HPO_Frequency__c":"Frequent (30-79%)","Feature__r":{"HPO_Description__c":"The presence of an abnormal lateral curvature of the spine.","HPO_Feature_URL__c":"https://hpo.jax.org/browse/term/HP:0002650","HPO_Name__c":"Scoliosis","Feature_System__c":"Musculoskeletal System","HPO_Feature_Type__c":"Symptom"}},{"Provided_By__c":"ORPHA:424107","HPO_Frequency__c":"Frequent (30-79%)","Feature__r":{"HPO_Description__c":"A disorder of muscle unrelated to impairment of innervation or neuromuscular junction.","HPO_Feature_URL__c":"https://hpo.jax.org/browse/term/HP:0003198","HPO_Synonym__c":"Muscle tissue disease; Myopathic changes","HPO_Name__c":"Myopathy","Feature_System__c":"Musculoskeletal System","HPO_Feature_Type__c":"Symptom"}},{"Provided_By__c":"ORPHA:424107","HPO_Frequency__c":"Excluded (0%)","Feature__r":{"HPO_Description__c":"Breakdown of muscle fibers that leads to the release of muscle fiber contents (myoglobin) into the bloodstream.","HPO_Feature_URL__c":"https://hpo.jax.org/browse/term/HP:0003201","HPO_Synonym__c":"Breakdown of skeletal muscle","HPO_Name__c":"Rhabdomyolysis","Feature_System__c":"Musculoskeletal System","HPO_Feature_Type__c":"Symptom"}},{"Provided_By__c":"ORPHA:424107","HPO_Frequency__c":"Uncommon (<1-4%)","Feature__r":{"HPO_Description__c":"Paralysis of one or more extraocular muscles that are responsible for eye movements.","HPO_Feature_URL__c":"https://hpo.jax.org/browse/term/HP:0000602","HPO_Synonym__c":"Eye muscle paralysis; Paralysis of extraocular eye movement","HPO_Name__c":"Ophthalmoplegia","HPO_Feature_Type__c":"Symptom"}},{"Provided_By__c":"ORPHA:424107","HPO_Frequency__c":"Frequent (30-79%)","Feature__r":{"HPO_Description__c":"The presence of abnormal electromyographic patterns indicative of myopathy, such as small-short polyphasic motor unit potentials.","HPO_Feature_URL__c":"https://hpo.jax.org/browse/term/HP:0003458","HPO_Synonym__c":"EMG: myopathic changes; EMG: myopathy; Myopathic electromyogram","HPO_Name__c":"EMG: myopathic abnormalities","Feature_System__c":"Musculoskeletal System","HPO_Feature_Type__c":"Procedure_EMG"}},{"Provided_By__c":"ORPHA:424107","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:424107","HPO_Frequency__c":"Frequent (30-79%)","Feature__r":{"HPO_Feature_URL__c":"https://hpo.jax.org/browse/term/HP:0002828","HPO_Name__c":"Multiple joint contractures","Feature_System__c":"Musculoskeletal System","HPO_Feature_Type__c":"Symptom"}},{"Provided_By__c":"ORPHA:424107","HPO_Frequency__c":"Frequent (30-79%)","Feature__r":{"HPO_Description__c":"Multiple small zones of sarcomeric disorganization and lack of oxidative activity (known as minicores) in muscle fibers.","HPO_Feature_URL__c":"https://hpo.jax.org/browse/term/HP:0003789","HPO_Name__c":"Minicore myopathy","Feature_System__c":"Musculoskeletal System","HPO_Feature_Type__c":"Symptom"}},{"Provided_By__c":"ORPHA:424107","HPO_Frequency__c":"Frequent (30-79%)","Feature__r":{"HPO_Description__c":"A facial appearance characteristic of myopathic conditions. The face appears expressionless with sunken cheeks, bilateral ptosis, and inability to elevate the corners of the mouth, due to muscle weakness.","HPO_Feature_URL__c":"https://hpo.jax.org/browse/term/HP:0002058","HPO_Synonym__c":"Myopathic face; Myopathic facial appearance","HPO_Name__c":"Myopathic facies","HPO_Feature_Type__c":"Symptom"}},{"Provided_By__c":"ORPHA:424107","HPO_Frequency__c":"Frequent (30-79%)","Feature__r":{"HPO_Description__c":"Malignant hyperthermia is characterized by a rapid increase in temperature to 39-42 degrees C. Malignant hyperthermia may occur in response to either inhalational anesthetics such as halothane, to muscle relaxants such as succinylcholine, or to exercise.","HPO_Feature_URL__c":"https://hpo.jax.org/browse/term/HP:0002047","HPO_Name__c":"Malignant hyperthermia","HPO_Feature_Type__c":"Symptom"}},{"Provided_By__c":"ORPHA:424107","HPO_Frequency__c":"Frequent (30-79%)","Feature__r":{"HPO_Description__c":"An abnormal predominance of type I muscle fibers (in general, this feature can only be observed on muscle biopsy).","HPO_Feature_URL__c":"https://hpo.jax.org/browse/term/HP:0003803","HPO_Synonym__c":"Type I muscle fiber predominance","HPO_Name__c":"Type 1 muscle fiber predominance","Feature_System__c":"Musculoskeletal System","HPO_Feature_Type__c":"Symptom"}},{"Provided_By__c":"ORPHA:424107","HPO_Frequency__c":"Excluded (0%)","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:424107","HPO_Frequency__c":"Frequent (30-79%)","Feature__r":{"HPO_Description__c":"An increased susceptibility to respiratory infections as manifested by a history of recurrent respiratory infections.","HPO_Feature_URL__c":"https://hpo.jax.org/browse/term/HP:0002205","HPO_Synonym__c":"Frequent respiratory infections; Multiple respiratory infections; Recurrent respiratory infections; respiratory infections, recurrent; Susceptibility to respiratory infections","HPO_Name__c":"Recurrent respiratory infections","Feature_System__c":"Respiratory system; Immune System","HPO_Feature_Type__c":"Symptom"}},{"Provided_By__c":"ORPHA:424107","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:424107","HPO_Frequency__c":"Frequent (30-79%)","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":"ORPHA:424107","HPO_Frequency__c":"Excluded (0%)","Feature__r":{"HPO_Feature_URL__c":"https://hpo.jax.org/browse/term/HP:0040191","HPO_Synonym__c":"Atrophy of the rectus femoris muscles","HPO_Name__c":"Rectus femoris muscle atrophy","Feature_System__c":"Musculoskeletal System","HPO_Feature_Type__c":"Symptom"}},{"Provided_By__c":"ORPHA:424107","HPO_Frequency__c":"Frequent (30-79%)","Feature__r":{"HPO_Description__c":"Impaired ability to eat related to problems gathering food and getting ready to suck, chew, or swallow it.","HPO_Feature_URL__c":"https://hpo.jax.org/browse/term/HP:0011968","HPO_Synonym__c":"Decreased oral intake; Feeding difficulties; Feeding problems; Poor feeding","HPO_Name__c":"Feeding difficulties","Feature_System__c":"Digestive System","HPO_Feature_Type__c":"Symptom"}},{"Provided_By__c":"ORPHA:424107","HPO_Frequency__c":"Frequent (30-79%)","Feature__r":{"HPO_Description__c":"Muscular hypotonia (abnormally low muscle tone) affecting the musculature of the trunk.","HPO_Feature_URL__c":"https://hpo.jax.org/browse/term/HP:0008936","HPO_Synonym__c":"Low muscle tone in trunk; Muscular hypotonia of the trunk; Truncal hypotonia","HPO_Name__c":"Axial hypotonia","Feature_System__c":"Musculoskeletal System","HPO_Feature_Type__c":"Symptom"}}],"tags":{"Cause":["Genetics"],"Disease Category":["Genetics","Neurology"],"Specialist":["Genetics","Neurology","Neuromuscular medicine","Pediatrics"]},"synonyms":[""]}