It may be difficult to differentiate renal cell carcinoma involving collecting system from renal pelvis urothelial tumor invading into renal parenchyma. The purpose of this study was to find out CT differential points of two diseases.
15 cases suggested invasion into other compartment in CT images were selected and evaluated about the presence or absence of hydronephrosis, CT renal function, renal contour changes due to mass and tentative diagnosis.
Renal cell carcinoma was characterized by no hydronephrosis(80%), normal CT renal function (110%) and outward bulging mass(100%), However, renal pelvis urothelial tumorshowed hydronephrosis(70%), abnormal CT renal function(60%) and preserved
reniform
shape(100%).
In conclusion, renal contour changes and CT renal function are reliable criteria in differentiating two diseases.
|