[One case of malignant mesothelioma that developed right pneumothorax after a diagnosis with left pneumothorax].

The merger of malignant pleural mesothelioma and pneumothorax is rare, and it is said that a very low percentage of malignant pleural mesothelioma detected with pneumothorax is reported. Furthermore, there are few case reports in which bilateral pneumothorax was caused by malignant pleural mesothelioma. We have made a diagnosis of malignant pleural mesothelioma with left pneumothorax here, and report our experience with this rare case that complicated the right pneumothorax throughout treatment.