Scapuloperoneal muscular dystrophy

**Definition:** Scapuloperoneal muscular dystrophies are a group of genetically heterogeneous myopathies characterised by progressive weakness and wasting of scapular and anterior leg muscles. Emery-Dreifuss muscular dystrophy is a classic scapuloperoneal muscular dystrophy associated with early contractures and cardiac arrhythmia, but other muscle disorders can also present with a scapuloperoneal phenotype.

**Exclusions:** - Secondary myopathies - Myasthenia gravis or certain specified neuromuscular junction disorders