Sonographic evaluation of renal masses.

Basic technique of evaluating renal mass lesions is presented. The analytic criteria of separating cystic from solid lesions are reviewed along with the differential points of the intermediate mass lesion that does not meet the classical hallmark of a simple cyst. Experience has shown that sonography could be the first evaluation step in a renal mass since it is not invasive, does not employ ionizing radiation, and is cost effective.