| Namespace | disease_ontology | Obsolete | false |
| description | A congenital myopathy that is characterized by childhood onset of congenital joint contractures, external ophthalmoplegia, and proximal muscle weakness, and that has_material_basis_in heterozygous, compound heterozygous, or homozygous mutation in the gene encoding myosin heavy chain IIa ( (MYHC2A or MYH2) on chromosome 17p13. |
