User:Lukelahood/sandbox

Classification and terminology
FSHD is most popularly subdivided based on its genetic cause into FSHD1 and FSHD2, although this scheme has little relevance beyond laboratory methods of diagosis and how the disease is inherited.

FSHD can also be specified based on when it manifests. Infantile-onset describes FSHD that presents in infancy. Adult-onset describes FSHD that presents in adulthood.

Various other descriptors have been applied to FSHD based on the muscles involved. Facial-sparing, scapulo-peroneal, scapulo-humeral FSHD have all been used. However, these are just descriptors for which signs and symptoms are present in a disease that is already well-known to be extremely variable; an affected sibling could easily have the classic form of disease.