ABSTRACT
Renal cysts are common benign lesions of the kidney estimated to occur in at least 24% of individuals older than 40 years and 50% of individuals older than 50 years, who are evaluated by abdominal computed tomography for nonurologic indications (1). With the recent widespread and increase use of abdominal cross-sectional radiographic imaging, the incidence of asymptomatic renal cysts is likely higher than previous estimates. Although renal cyst may be congenital or acquired, most are simple, asymptomatic, and of unknown etiology. However, some patients develop abdominal and/or flank pain, hematuria, hypertension, recurrent infection, or obstructive uropathy as a result of a renal cyst (2).
