What is the prevalence of renal masses?

Updated: Feb 05, 2019
  • Author: Richard A Santucci, MD, FACS; Chief Editor: Bradley Fields Schwartz, DO, FACS  more...
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Overall, the vast majority of incidentally discovered renal masses are cysts. Abdominal CT scanning reveals a simple renal cyst in 25% of patients older than 40 years. Others report the presence of renal cysts in more than 50% of men older than 50 years. When a patient presents with a renal mass in association with macroscopic hematuria, flank pain, or a palpable mass, the chance of the mass being renal cell cancer is approximately 50%. Other renal masses, specifically angiomyolipoma, renal pelvic tumors, and other benign lesions, all are relatively uncommon, accounting for approximately 5% of all renal masses among asymptomatic patients.

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