Dewan P A, Keenan R J, Morris L L, Le Quesne G W
Urology Unit, Women's and Children's Hospital, Adelaide, South Australia.
Br J Urol. 1994 Jan;73(1):91-5. doi: 10.1111/j.1464-410x.1994.tb07463.x.
To determine whether there are two distinct types of congenital obstruction of the proximal urethra.
Three boys with a congenital bulbar urethral narrowing (Cobb's collar) were examined. Recent papers on congenital obstructive posterior urethral membrane (COPUM) were reviewed.
The more proximal lesion is a membranous obstruction which is able to prolapse as far as the bulbar urethra, but has paramedian folds that attach along the posterior wall of the urethra to the verumontanum, and is due to persistence of an embryological attachment between the distal verumontanum and the anterior wall of the posterior urethra. The more distal narrowing is not always obstructive and is primarily a bulbar urethral membrane, is independent of the verumontanum and external sphincter, and may represent a persistence of part of the urogenital membrane.
There are two distinct types of congenital obstruction of the proximal urethra, with the association to the verumontanum being the distinguishing feature.
确定近端尿道是否存在两种不同类型的先天性梗阻。
对3例患有先天性球部尿道狭窄（科布氏环）的男孩进行了检查。回顾了近期关于先天性梗阻性后尿道膜（COPUM）的论文。
更靠近近端的病变是一种膜性梗阻，它能够脱垂至球部尿道，但有中位旁皱襞，沿尿道后壁附着于精阜，这是由于远端精阜与后尿道前壁之间胚胎学附着的持续存在所致。更靠近远端的狭窄并不总是梗阻性的，主要是球部尿道膜，独立于精阜和外括约肌，可能代表泌尿生殖膜的一部分持续存在。
近端尿道存在两种不同类型的先天性梗阻，与精阜的关联是其区别特征。
