Cronan J J, Amis E S, Yoder I C, Kopans D B, Simeone J F, Pfister R C
J Ultrasound Med. 1982 Aug;1(6):229-36. doi: 10.7863/jum.1982.1.6.229.
Static and real-time ultrasound examinations have proved clinically useful in the evaluation of renal obstruction. False-negative findings are rare. False-positive findings have been reported as being due to slightly dilated, nonobstructed urinary systems causing the ultrasonographic appearance of mild (grade I) hydronephrosis. The authors describe the ultrasonographic appearance of 16 false-positive cases that had suggested moderate (grade II) to severe (grade III) hydronephrosis in collecting systems subsequently shown to be completely unobstructed. This appearance was caused by peripelvic cysts. These cases emphasize the screening role of ultrasound and the need to employ additional diagnostic modalities to verify the presence of hydronephrosis and renal obstruction.
静态和实时超声检查已被证明在评估肾梗阻方面具有临床实用性。假阴性结果很少见。据报道，假阳性结果是由于泌尿系统轻度扩张但无梗阻，导致超声检查显示轻度（I级）肾积水。作者描述了16例假阳性病例的超声表现，这些病例提示集合系统中存在中度（II级）至重度（III级）肾积水，但随后显示完全无梗阻。这种表现是由肾盂旁囊肿引起的。这些病例强调了超声的筛查作用以及采用其他诊断方法来证实肾积水和肾梗阻存在的必要性。
