College of American Pathologists
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2009 — April Case of the Month

Updated March 27, 2009


CAP Foundation April 2009 Online Case of the Month

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A 39-year-old woman presented with recurrent bouts of right upper quadrant pain. Radiographic studies revealed gallbladder stones. A cholecystectomy was performed. A 9.0 cm gallbladder was received containing multiple stones measuring up to 0.5 cm. The wall was diffusely thickened without masses. An immunostain for tryptase was positive in the majority of cells.

The master list with the correct answer

  • Atypical mycobacteria infection
  • Eosinophilic cholecystitis
  • Langerhan cell histiocytosis
  • Mastocytosis
  • Whipple disease
  • Xanthogranulomatous cholecystitis

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  • Appropriate diagnosis
  • Critique
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