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The utility of retrograde pyelography to follow up incompletely opacified ureters on CT urography.
Abdominal Radiology ( IF 2.3 ) Pub Date : 2020-03-01 , DOI: 10.1007/s00261-019-02121-0
Anirudh Paspulati 1 , Akshya Gupta 1 , Paul A Hill 1 , Matthew A Morgan 1
Affiliation  

PURPOSE Retrograde pyelography (RPG) is used in some centers to further evaluate patients with incompletely opacified segments on CT urography (CTU). This study intends to evaluate the utility of this imaging combination in terms of the yield of abnormal findings on the follow up RPG. METHODS In this retrospective study, we searched the radiology database over a three-year period (11/1/2015-10/30/2018) for patients who had a CTU and then a diagnostic RPG within 180 days. Images and reports were reviewed from this period for patients who met the inclusion criteria. RESULTS 292 patients underwent a CTU with follow up RPG over the search period. 131/292 RPGs (44.9%) were performed because the CTU described at least one incompletely opacified ureteral segment. Of the 148 ureters evaluated in these 131 patients, 4 ureters (2.7%) showed an abnormality on follow up retrograde pyelogram-two revealed a stricture at the unfilled segment, and two revealed contour irregularity in the distal ureter (biopsy showed urothelial cell carcinoma in these two). CONCLUSION There is a relatively low yield for detecting ureteral abnormalities when a retrograde pyelogram is performed after a CTU to evaluate an incompletely opacified ureteral segment-2.7% in our study, with only two of these incompletely opacified segments containing urothelial cancer (1.4%). In these two cases, a ureteral abnormality was visible on the CTU and RPG would seem to have a very low yield for follow up of unopacified ureteral segments if the ureters are otherwise normal-appearing on CTU and there is no hydronephrosis.

中文翻译:

逆行肾盂造影在CT泌尿造影上随访不完全浑浊输尿管的实用性。

目的在一些中心使用逆行肾盂肾盂造影(RPG)来进一步评估CT尿路造影(CTU)中具有不完全浑浊段的患者。这项研究旨在根据随访RPG的异常结果的产生来评估这种影像学组合的实用性。方法在这项回顾性研究中,我们在三年(11/1 / 2015-10 / 30/2018)的放射学数据库中搜索了在180天内患有CTU然后诊断为RPG的患者。对符合入选标准的患者在此期间的图像和报告进行了回顾。结果292例患者在搜索期内接受了CTU随访RPG。因为CTU描述了至少一个不完全浑浊的输尿管段,所以进行了131/292 RPG(44.9%)。在这131位患者中评估的148个输尿管中,有4个输尿管(2。7%)的患者在逆行肾盂造影上表现出异常-其中两个在未充满节段显示狭窄,两个在输尿管远端显示轮廓不规则(活检显示这两个区域均出现尿路上皮细胞癌)。结论在我们的研究中,当CTU后进行逆行肾盂造影以评估不完全不透明的输尿管段时,检出输尿管异常的产率相对较低-在本研究中为2.7%,其中只有两个不完全不透明的输尿管上皮癌(1.4%)。在这两种情况下,CTU上可见输尿管异常,而如果输尿管在CTU上正常出现且没有肾积水,则RPG对于未遮盖输尿管段的随访似乎收率很低。还有两个显示了输尿管远端的轮廓不规则(活检显示这两个尿道上皮细胞癌)。结论在我们的研究中,当CTU后进行逆行肾盂造影以评估不完全不透明的输尿管段时,检出输尿管异常的产率相对较低-在本研究中为2.7%,其中只有两个不完全不透明的输尿管上皮癌(1.4%)。在这两种情况下,CTU上可见输尿管异常,而如果输尿管在CTU上正常出现且没有肾积水,则RPG对于未遮盖输尿管段的随访似乎收率很低。还有两个显示了输尿管远端的轮廓不规则(活检显示这两个尿道上皮细胞癌)。结论在我们的研究中,当CTU后进行逆行肾盂造影以评估不完全不透明的输尿管段时,检出输尿管异常的产率相对较低-在本研究中为2.7%,其中只有两个不完全不透明的输尿管上皮癌(1.4%)。在这两种情况下,CTU上可见输尿管异常,而如果输尿管在CTU上正常出现且没有肾积水,则RPG对于未遮盖输尿管段的随访似乎收率很低。结论在我们的研究中,当CTU后进行逆行肾盂造影以评估不完全不透明的输尿管段时,检出输尿管异常的产率相对较低-在本研究中为2.7%,其中只有两个不完全不透明的输尿管上皮癌(1.4%)。在这两种情况下,CTU上可见输尿管异常,而如果输尿管在CTU上正常出现且没有肾积水,则RPG对于未遮盖输尿管段的随访似乎收率很低。结论在我们的研究中,当CTU后进行逆行肾盂造影以评估不完全不透明的输尿管段时,检出输尿管异常的产率相对较低-在本研究中为2.7%,其中只有两个不完全不透明的输尿管上皮癌(1.4%)。在这两种情况下,CTU上可见输尿管异常,而如果输尿管在CTU上正常出现且没有肾积水,则RPG对于未遮盖输尿管段的随访似乎收率很低。
更新日期:2020-02-25
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