Department of Radiology, Harvard Medical School, Massachusetts General Hospital, Boston, MA, USA.
Int Urol Nephrol. 2013 Apr;45(2):333-8. doi: 10.1007/s11255-013-0383-5. Epub 2013 Feb 5.
The Weigert-Meyer rule predicts the draining pattern of duplex ureters in bipolar renal duplications. This paper introduces two cases of nonpolar renal duplication. A 3-month-old and a 15-year-old female with history of urinary tract infection were evaluated with intravenous pyelograms (IVP) and eleven different parameters were analyzed. The infant's IVP showed an unobstructed side-to-side right renal duplication with normal-sized nondisplaced lateral moiety and a complete set of calyces, without drooping lily sign. The nonobstructed moiety projected medial and mildly inferior to the lateral moiety which had normal height and axis. The ureters joined each other in lower abdomen. Severe platyspondyly was noted due to hyperalimentation-induced metabolic bone disease. The second case had an unobstructed interpolar extra moiety between the upper and the lower poles with an otherwise unobstructed, normally sized single-system kidney, without drooping lily sign. The paradigm shift from classic anatomic to contemporary cell biological theory validates the nonpolar renal duplication concept, with side-to-side and interpolar arrangements of the moieties, in defiance of Weigert-Meyer rule.
Weigert-Meyer 法则预测了双肾盂输尿管的引流模式。本文介绍了两例非极性肾盂重复畸形。一名 3 个月大的女婴和一名 15 岁的女性因尿路感染接受了静脉肾盂造影（IVP）检查，分析了 11 个不同的参数。婴儿的 IVP 显示右侧肾脏从一侧到另一侧的无梗阻性重复，外侧部分大小正常，无移位，并且有完整的肾盏，没有垂莲征。无梗阻的部分向内侧和轻度下方投射，外侧部分具有正常的高度和轴。输尿管在腹部下方相连。由于高营养引起的代谢性骨病，注意到严重的扁平椎骨。第二例为上极和下极之间的无梗阻性极间额外部分，具有无梗阻、正常大小的单系统肾脏，无垂莲征。从经典的解剖学到当代细胞生物学理论的范式转变，验证了非极性肾盂重复畸形的概念，具有侧到侧和极间的排列方式，这违反了 Weigert-Meyer 法则。
