Type : Phenotype or locus, molecular basis unknown;
Alternative titles and symbols : FSHSMA;
Description : Fenichel et al. (1967) described a family in which weakness was confined mainly to
the face and pectoral girdle musculature. Onset was in early adult life and the disorder
was slowly progressive. The disorder superficially resembles facioscapulohumeral muscular
dystrophy, from which it is differentiated by muscle histology and electromyography.
Siddique et al. (1989) could prove no linkage with 10 expressed and 7;