Spontaneous left pneumothorax revealing an atypical carcinoid tumor: a case report.

The association between spontaneous pneumothorax and a bronchial tumor is rare, and even more so with an atypical carcinoid tumor. This rare and unexpected case highlights the importance of raising clinician awareness about investigating the underlying cause of pneumothorax through endoscopic exploration. A 52-year-old female was exposed to passive smoking by her husband for 20 years.