RT Journal Article SR Electronic T1 Inclusion body myositis JF Cleveland Clinic Journal of Medicine JO Cleve Clin J Med FD Cleveland Clinic SP 583 OP 589 VO 52 IS 4 A2 William R. Hart A1 Samuel M. Chou YR 1985 UL http://www.ccjm.org/content/52/4/583.abstract AB Inclusion body myositis was diagnosed based on three muscle biopsies on a 24-year-old woman during a 10-month period. She presented with a four-year history of severe painless weakness in her leg muscles that was refractory to both corticosteroid and cytotoxic drugs. Immunostaining for mumps viral antigen was positive for nuclear and cytoplasmic inclusions in skeletal muscle cells.