title: CLINICOPATHOLOGICAL conference; retroesophageal abscess secondary to esophageal perforation by a foreign body (safety pin) with esophageal ulceration.
mesh_terms: D000038:Abscess; D004935:Esophageal Diseases; D004939:Esophageal Perforation; D005547:Foreign Bodies; D006801:Humans; D010437:Peptic Ulcer; D012449:Safety