Mediastinal small cell carcinoma of unknown primary site: case report

A patient with mediastinal small cell carcinoma of unknown primary site, which has been reported only rarely in the literature, is presented in this case report. The patient, who received chemotherapy (CT) and radiotherapy (RT), is disease-free at 49 months after the diagnosis. As in the small cell carcinomas located at many other sites, especially the lungs, mediastinal small cell carcinoma of unknown primary site is sensitive to CT and RT; thus, this entity should be treated as small cell lung cancer.