A rare case of monophasic pleuropulmonary synovial sarcoma

Pleuropulmonary synovial sarcoma is a diagnostic challenge. Synovial sarcoma is a soft tissue tumor of joints and extremities and are rarely seen in the mediastinum. We report this tumor at a very unusual location – the mediastinum in a 40-year-old female. The histopathology picture along with the location suggested a differential diagnosis of solitary fibrous tumor or mesothelioma, but immunohistochemistry helped in reaching the diagnosis of synovial sarcoma.