Catalog

Myasthenia gravis, familial

No MMS code

Link to WHO Definition

Myasthenia gravis, familial – http://id.who.int/icd/entity/1678732111

Family history is positive in 3-5% of Myasthenia Gravis (MG) patients. Most commonly affected patients are of the same generation. Age at onset 2-20 years. The clinical picture is similar to that of non-familial MG with ocular, oculobulbar or generalised MG. In an Italian-American family with parental consanguinity where 5 out of 10 siblings had late-onset autoimmune MG manifesting with ptosis, diplopia, and weakness in the neck and extremities a homozygous sequence variant in the Ecto-NOX Disulfide-Thiol exchanger 1 (ENOX1) gene was found.