Ultrasound In Diagnosis Of Cystic Renal Cell Carcinoma

Objective To explore the value of ultrasound in diagnosis of cystic renal cell carcinomas.Methods Ultrasonic features in 27 cases including 29 focus with surgically and pathologically proved cystic renal cell carcinoma were analyzed.Results According to the number of their capsular spaces, cystic renal carcinomas were classified into two patterns:single-cystic renal cell carcinoma and multi-cystic renal cell carcinoma. In our cases, compared with single-cystic renal cell carcinoma, the long diameter of multi-cystic renal cell carcinoma were enlarged (P=0.03,<0.05). Among ultrasonic findings of cystic renal cell carcinomas,14 cases with 15 focus had irregular thickening cystic wall and/or septum, among which 1 case with diffuse calcification on thickening cystic wall and septum. The cystic wall were regular in 2 cases which were misdiagnosed as cyst of kindey, and the septum was regular in 1 case which was misdiagnosed as multilocular cyst of kindey.10 cases with 11 focus had nodules on the cystic wall and/or septum and only one case had cystic change in nodule on the cystic wall. There were 14 cases with limous capsular space which showed meticulous and punctiform weak echo or inhomogeneous and hyperechoic sludged blood. The signal of arterial blood flow could be found in thickening cystic wall and septum and solid nodules by color Dopplar ultrasonography. Maximum velocity (Vmax) and resistence index (RI) were without significant in feeding artery of single-cystic renal cell carcinomaand multi-cystic renal cell carcinoma (P=0.39,0.36,>0.05). Pulse Doppler showed there were no significantly different in Vmax and RI between feeding artery of focus and normal interlobar artery of kidney(P=0.25,0.27,> 0.05).Conclusions Ultrasonography plays an important role in the diagnosis, differential diagnosis and early therapy of cystic renal cell carcinoma.