Successful treatment of thymic carcinoma with dermatomyositis and interstitial pneumonia: A case report.

Here, we report a rare case of thymic carcinoma (TC) associated with dermatomyositis (DM) and interstitial pneumonia (IP) in a 68-year-old man. The patient presented with the characteristic features of a skin rash with Gottron's papules and increased serum levels of muscle-associated enzymes. Computed tomography (CT) showed the presence of an anterior mediastinal soft tissue mass with IP, which was diagnosed as TC by CT-guided tumor biopsy. The patients DM and IP disappeared completely after radical resection of the tumor. After a 20-month follow-up period, the patient was in good clinical condition without disease recidivism.