Epidemiology

 In a large study in Israel conducted by Weissberg D, Refaely , spontaneous pneumothoraces occurred in 723 (60.3%) of 1199 cases; of these, 218 were primary and 505 were secondary. Traumatic pneumothorax occurred in 403 (33.6%) patients, 73 (18.1%) of whom had iatrogenic pneumothorax