An autosomal dominant disorder affecting the skeletal muscles of the face, scapula, and upper arm. patients present with muscle weakness in these anatomic areas. the muscle weakness eventually spreads to other skeletal muscles as well.

Facioscapulohumeral muscular dystrophy (FSHD) is a type of muscular dystrophy, a group of heritable diseases that cause degeneration of muscle and progressive weakness. Per the name, FSHD tends to sequentially weaken the muscles of the face, those that position the scapula, and those overlying the humerus bone of the upper arm...