Fatal and Benign Congenital Myopathies: Differential Diagnosis

Muscle biopsies from four infants with fatal myopathy and four with benign myopathy were examined using biochemical, histochemical and immunohistochemical techniques in the Departments of Neurology, Pathology and Genetics, Columbia University, New York; Universita Cattolica del Sacro Cuore, Rome, Italy; and Fachbereich Chemie, Philipps-Universitat, Marburg, Germany.