A Case of Overlap Syndrome with Rheumatoid arthritis and Polymyositis

Overlap syndrome is a combination of major features of more than one rheumatic disease present in the same patient such as rheumatoid arthritis (RA), systemic lupus erythematosus (SLE), systemic sclerosis (SSc), and polymyositis. Polymyositis and RA are independent rheumatic diseases that may have a variety of overlapping clinical, radiological, and pathological manifestations according to different accepted criteria. Overlap syndrome with RA and polymyositis is rarely reported worldwide. We reported a rare case of overlap syndrome RA and polymyositis with relevant literatures.