Myopathies Each of these biopsies is from a patient with a myopathy. There is variabiltiy in muscle fiber size, Small fibers are rounded.
Connective tissue is increased.
A A 1 year old boy presents with motor delay since birth. Serum CK is elevated at 950. Congenital Muscular Dystrophy B A 20 year old male noted difficulty climbing stairs. Examination shows symmetric proximal weakness. Serum CK is 500.