College of American Pathologists

2012 — November Case of the Month

Posted November 27, 2012


CAP Foundation Online Case of the Month

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This 42-year-old woman had a pelvic mass discovered during her annual physical exam. A 15.0 cm right ovarian tumor was removed at surgery. The cut surface of the tumor was tan, markedly hemorrhagic and multicystic. There were no discernible papillary excrescences. Immunohistochemical stains performed on representative tumor sections showed: a-fetoprotein +, PLAP +, β-HCG –, CK7 –, EMA –, AE1/AE3 +.

The master list with the correct answer

  • Clear cell carcinoma
  • Dysgerminoma
  • Embryonal carcinoma
  • Endometrioid adenocarcinoma
  • Yolk sac tumor

Access Case Critique to view:

  • Appropriate diagnosis
  • Critique
  • References

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