College of American Pathologists

2011 — November Case of the Month

Posted November 15, 2011


CAP Foundation November 2011 Online Case of the Month

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A 54-year-old woman underwent gallbladder ultrasound for abdominal pain and an incidental right upper pole kidney mass was discovered. A subsequent CT scan demonstrated a homogeneous non-cystic mass measuring 4.9 cm in greatest dimension. There was no involvement of the right adrenal gland and no lymph node enlargement. A right partial nephrectomy was performed. Grossly the tumor was tan with a lobulated cut surface. There was no apparent central scar. There was no capsular or renal sinus invasion. The renal vein was not involved.

The master list with the correct answer

  • Chromophobe renal cell carcinoma
  • Conventional (clear cell) renal cell carcinoma
  • Epithelioid angiomyolipoma
  • Metastatic hepatocellular carcinoma
  • Renal oncocytoma

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  • Appropriate diagnosis
  • Critique
  • References

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