Which of the following bone tumor present secondaries in lung with pneumothorax:: (A) Osteosarcoma, (B) Ewing's sarcoma, (C) Osteoclastoma, (D) Chondroblastoma
Answer is A. Both osteogenic sarcoma and Ewing's sarcomamay have metastasis to lung. It is much more common in osteogenic sarcoma and about 10% of patients have pulmonary metastasis by the time they are first seen. Incidence of pneumothorax is higher in osteosarcoma metastasis.