title: Rheumatoid arthritis with unusual myositis resembling muscular dystrophy.
mesh_terms: D000328:Adult; D001132:Arm; D001172:Arthritis, Rheumatoid / Q000150:complications* / Q000473:pathology; D001706:Biopsy; D003951:Diagnostic Errors; D004576:Electromyography; D005260:Female; D006801:Humans; D009132:Muscles / Q000473:pathology; D009133:Muscular Atrophy / Q000175:diagnosis; D009136:Muscular Dystrophies / Q000175:diagnosis*; D009220:Myositis / Q000150:complications* / Q000175:diagnosis / Q000473:pathology