Gotoh T, Takahashi Y, Kumagai A, Tokunaka S, Koyanagi T
J Urol. 1983 Sep;130(3):550-2. doi: 10.1016/s0022-5347(17)51299-9.
We report 2 rare cases of single ectopic ureter simulating double vas deferens. Clinical, radiographic and macroscopic signs at operation indicated a single ectopic ureter opening into the seminal tract. However, histological examination of the surgical specimen revealed that the lumen of the supposed ureter was lined in part by columnar epithelium, although chiefly by transitional epithelium. The wall of the ureter contained 3 well defined muscular coats in case 1 but only 1 layer was distinguishable in case 2. Histological composition of the structure removed from the cranial site resembled that of the epididymis. A review of the literature revealed a few comparable cases. Analysis of these cases suggests that double vas deferens and a single ectopic ureteral opening into the seminal tract are such that their differentiation may only have semantic significance. We speculate that these 2 diseases are included as 1 entity, only to be distinguished by the difference of ureterization of the ureteral bud.
我们报告2例罕见的单条异位输尿管模拟双侧输精管的病例。临床、影像学及手术中的宏观表现提示单条异位输尿管开口于精道。然而，手术标本的组织学检查显示，所谓输尿管的管腔部分内衬柱状上皮，尽管主要为移行上皮。输尿管壁在病例1中有3层界限分明的肌层，但在病例2中仅可分辨出1层。从头部位置切除结构的组织学构成类似于附睾。文献回顾发现了一些类似病例。对这些病例的分析表明，双侧输精管和单条异位输尿管开口于精道的情况，其鉴别可能仅具有语义学意义。我们推测这两种疾病被归为一个实体，只是通过输尿管芽的输尿管化差异来区分。
