title: Diaphragmatic weakness and myositis associated with systemic juvenile rheumatoid arthritis.
abstract: An unusual presentation of systemic juvenile rheumatoid arthritis in a young adult is reported. Among the major manifestations were severe muscle weakness and dyspnea, which were found to be due to myositis and diaphragmatic weakness. The evolution of the disease and its response to therapy are described.
mesh_terms: D000293:Adolescent; D001171:Arthritis, Juvenile / Q000150:complications* / Q000503:physiopathology; D003964:Diaphragm / Q000503:physiopathology*; D006801:Humans; D008297:Male; D009220:Myositis / Q000150:complications* / Q000503:physiopathology; D010994:Pleura / Q000503:physiopathology; D011312:Pressure; D012129:Respiratory Function Tests; D013270:Stomach / Q000503:physiopathology