title: Recurrent non-surgical pneumoperitoneum due to spontaneous pneumothorax.
mesh_terms: D006801:Humans; D008297:Male; D008875:Middle Aged; D011027:Pneumoperitoneum / Q000000981:diagnostic imaging / Q000209:etiology*; D011030:Pneumothorax / Q000150:complications* / Q000000981:diagnostic imaging; D011859:Radiography; D012008:Recurrence