Arger P H, Mulhern C B, Pollack H M, Banner M P, Wein A J
AJR Am J Roentgenol. 1979 Mar;132(3):407-11. doi: 10.2214/ajr.132.3.407.
The value of ultrasound in determining the etiology of nonopaque filling defects seen in the renal pelvis at intravenous urography is under study. The ultrasound findings in three patients with proven transitional cell carcinoma of the kidney were similar and consisted of separation of the central renal echo complex by a region of low-intensity echoes. This pattern is distinct from characteristically echogenic nonopaque renal calculi and anechoic hydronephrosis. Renal collecting system blood clots may have an echo pattern similar to collecting system tumors, but can usually be distinguished by their mobility and transitory nature. Further investigation into the specificity and sensitivity of the ultrasonic diagnosis of renal collecting system masses is underway.
静脉肾盂造影时，超声在确定肾盂内非不透光充盈缺损病因方面的价值正在研究中。三名经证实患有肾移行细胞癌患者的超声检查结果相似，表现为中央肾回声复合体被低回声区域分隔。这种模式不同于典型的强回声非不透光肾结石和无回声肾积水。肾集合系统血凝块的回声模式可能与集合系统肿瘤相似，但通常可通过其可移动性和短暂性加以区分。对肾集合系统肿块超声诊断的特异性和敏感性的进一步研究正在进行中。
