Myopathy as paraneoplastic syndrome of colon malignancy in an elderly patient.

Neoplastic diseases may be complicated by rheumatic diseases or may be occur with them. Dermatomyositis/polymyositis and polymyalgia rheumatica are described as paraneoplastic syndromes. We report a case with proximal muscular weakness as only symptom of colon cancer in the absence of other symptoms and laboratory abnormalities, and we discuss the nosological classification as a possible atypical form of polymyositis.