title: [Retroperitoneal perforation of duodenal ulcer with abscess formation].
mesh_terms: D000038:Abscess / Q000209:etiology*; D004381:Duodenal Ulcer / Q000150:complications; D006801:Humans; D008297:Male; D008875:Middle Aged; D010439:Peptic Ulcer Perforation / Q000150:complications*; D012187:Retroperitoneal Space