Figure 10b. Septated or multiloculated cystic lesion in a 60-year-old woman being evaluated for an abnormal uterus. Axial CT scan (a) and coronal reformatted image (b) show a well-defined, 3-cm-diameter cystic mass in the upper pole of the left kidney. The lesion appears to contain three or four septations, which are smooth without large nodular elements. At surgery, a multiloculated renal cell carcinoma was removed.