Renal oncocytoma epidemiology and demographics

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Editor-In-Chief: C. Michael Gibson, M.S., M.D. [1]; Associate Editor(s)-in-Chief: Homa Najafi, M.D.[2] Shanshan Cen, M.D. [3]

Epidemiology and Demographics

Incidence

• The incidence of renal oncocytoma is approximately 3% to 7% of solid renal resected tumors.

Age

• Patients of all age groups may develop renal oncocytoma. The age of patients can be differ from 10 to 94 years.
• The incidence of renal oncocytoma increases with age; the median age at the time of surgery is 62 to 68 years.

Gender

• Males are more commonly affected by renal oncocytoma than females. The male to female ratio is approximately 2 to 1.

The peak incidence of detection is in the seventh decade of life. This finding suggests that renal oncocytomas occur in a relatively older age group than in those patients with typical renal cell carcinoma (RCC), for whom the median age in large series is always approximately 55 years. However, taking into account that renal oncocytoma grows very slowly, it might start developing at an earlier age, around 30–50 years. For the cases of renal oncocytoma with reported sex, men are affected nearly twice as often as women

The ratio of oncocytoma among male and female patients appears to be 2 to 3:1, similar to the ratio seen in renal cell carcinoma (RCC). Mean age at the time of resection in large series has ranged from 62 to 68 years of age [3•,4,7,8].