Multifocal renal cell carcinoma associated with multiple simple renal cysts: A rare presentation

Simple renal cysts are the most common renal masses but the major concern is to differentiate a simple renal cyst from a complex cyst which may have foci of malignancy. However, this association is seen in 1% cases only. Most of the renal cysts are benign, asymptomatic and are usually treated conservatively. However, various cystic diseases are associated with renal cell carcinoma. Renal cysts with thickened, irregular septa and enhancement on contrast injection raise a suspicion of malignancy. We present a case of a 41 year old male who presented with renal cell carcinoma of left kidney with multiple simple renal cysts.