This article has no abstract; the first 100 words appear below.

A 50-year-old woman presented with abdominal tenderness, fever, and vaginal bleeding. Physical examination showed a periumbilical mass and necrosis of the upper wall of the vagina. Laboratory data were notable for a leukocyte count of 14,600 per cubic millimeter, without eosinophilia. Computed tomography showed a large intraabdominal cystic lesion with variable density and a thick wall (Panel A, arrow). Fine-needle aspiration revealed no signs of cancer or parasitic infection. Diagnostic considerations included an infected pseudocyst and a mesenteric or dermoid cyst. Antibiotic therapy was started, and the patient recovered quickly. Explorative laparotomy revealed an intraabdominal plastic bag containing 80 g . . .