College of American Pathologists

2014 — February Case of the Month

Posted February 25, 2014


CAP Foundation Online Case of the Month

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A 44-year-old woman who initially presented with vague abdominal pain was found to have an abdominal mass for which she underwent a right hemicolectomy. The 20.0 cm cystic mass involved the external surfaces of the ileum, appendix and small portion of attached omentum. The cystic spaces were lined by calretinin-positive, D2-40-positive cells.

The master list with the correct answer

  • Florid cystic endosalpingiosis
  • Lymphangioma
  • Malignant peritoneal mesothelioma
  • Multicystic peritoneal mesothelioma
  • Pseudomyxoma peritonei

Access Case Critique to view:

  • Appropriate diagnosis
  • Critique
  • References

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