High-Grade Rib Osteosarcoma in a 57-Year-Old Man-A Case Report

Osteosarcoma, usually seen in children and adolescents, is rarely found in adults. When it occurs, it is frequently found in the long bones, seldom in the flat bones. We report a 57-year-old man with a tender chest wall mass and massive pleural effusion. He was initially treated for presumptive tuberculosis, but did not respond to treatment. Further evaluation revealed a high-grade osteosarcoma of a rib. It was resected, followed by radiotherapy. When a lung metastasis was subsequently detected, chemotherapy was added.