Multiphasic renal CT: comparison of renal mass enhancement during the corticomedullary and nephrographic phases.

Abstract

Enhancement of renal neoplasms is time dependent and may not be evident in hypovascular tumors analyzed during the early corticomedullary phase. Reliance on absolute CT attenuation measurements, without use of internal standards as controls, may lead to misdiagnosis of neoplasms as cysts.