Unusual Cause of Spontaneous Bilateral Pneumothorax Secondary to Osteosarcoma Metastasis.

Spontaneous pneumothorax is an emergency situation and early diagnosis and management is very important. Pneumothorax is rarely the first manifestation of lung metastasis. Spontaneous pneumothoraxes have been reported in some osteosarcoma patients. We hereby report a case of a bilateral spontaneous pneumothorax, revealing metastasis of an osteosarcoma.