[Spontaneous pneumothorax: unusual manifestation of pulmonary hamartochondroma].

Hamartochondroma is a benign tumor of the tracheobronchial tree, often found incidentally and rarely symptomatic. It is more common in men than in women. Its radiological aspect is often evocative. Surgery is indicated for large and/or symptomatic tumors. Histological diagnosis usually poses no difficulty We report the case of a 30-year-old young patient with no particular past medical history and with spontaneous pneumothorax revealing a large sized hamartochondroma. This rare association could be explained by the fact that tumors of fairly anarchic composition may contain cyst formations that may rupture into the pleura causing effusions.