Giant oncocytoma of kidney: an incidental diagnosis

The Oncocytoma is the second most common solid tumor of the kidney after renal cell carcinoma (RCC). Exact etiology is not known. Majority of oncocytoma are asymptomatic and cannot be differentiated from RCC by clinical or radiographic criteria. Very few cases of symptomatic giant oncocytomas of kidney are reported in the English literature. The tumor was incidentally diagnosed, based on the preoperative clinical and radiographic findings; diagnosis of RCC was made. Here, we present a case of fifth largest symptomatic giant oncocytoma of kidney reported till date in the literature.