Bilateral spontaneous pneumothorax in osteogenic sarcoma due to occult pulmonary metastases

Spontaneous pneumothorax (SPTX) is an uncommon complication of osteogenic sarcoma. Most of these SPTX associated with osteogenic sarcoma are due to detectable pulmonary metastasis. Development of SPTX without any evidence of pulmonary metastasis is extremely rare. Herein, we report a case of a young girl with osteosarcoma of the right femur that developed pneumothorax on both sides following treatment with combination chemotherapy without any obvious pulmonary metastases, bullae, or blebs.