Comparative study of renal pelvic carcinoma by contrast-enhanced ultrasonography and contrast-enhanced computed tomography / 中华超声影像学杂志

ABSTRACT

Objective To compare and analyze the similarities and differences of the blood perfusion characteristics of the renal pelvic carcinoma displayed by contrast-enhanced ultrasonography(CEUS) and contrast-enhanced computed tomography(CECT).Methods The characteristics of CEUS and CECT were anzlyzed retrospectively in 40 confirmed renal pelvic carcinoma cases by operation and pathology.The modality and phases of enhancement,including wash-in and washout time,as well as the perfusion appearances,were observed by CEUS and CECT.Results CEUS detected the cortical phase enhancement in all renal pelvic tumors,including synchronously enhancement in 14 tumors and delayed enhancement in 26 tumors.At peak times,hypoechogenicity compared to the normal renal cortex was shown in 31 tumors,hyperechogenicity in 4 tumors and isoechogenicity in 5 tumors.Fast wash-out in medulla phase was displayed in 35 tumors,isochronously wash-out in 2 tumors and delayed wash-out in 3 tumors.The minimum diameter in 40 renal pelvic tumors was 1.5 cm.CECT showed the enhancement in 38 tumors,mostly mild to moderate homogeneous enhancement,and enhancement was lower than the surrounding renal parenchyma.The diagnostic accuracy of CEUS was 77.5％ (31/40),and the diagnostic accuracy of CECT was 82.5 ％ (33/40).The difference was not statistically significant between CEUS and CECT ( P ＞0.05).Conclusions CEUS and CECT have higher diagnostic accuracy of the renal pelvic carcinoma,so the joint detection can increase the detection rate of early diagnosis of the renal pelvic carcinoma.