A case of pleural osteosarcoma detected from pleural effusion

Abstract

A 46-year-old woman was admitted to our hospital because of dyspnea. Left pleural effusion was noted on a chest radiograph. Chest computed tomography revealed two round masses with a smooth margin and heterogeneous inner structure in the left chest wall. For diagnostic and therapeutic purposes, surgery was performed for the total removal of the tumors. Histopathologic examination revealed 80- and 50-mm tumors comprising bone tissue with osteoid, and the final diagnosis was osteosarcoma that originated from the pleura. The tumor recurred in the left chest wall 2 weeks after the operation, chemotherapy was conducted, and we performed surgical resection for the remitted tumors.