Myers R P, Goellner J R, Cahill D R
J Urol. 1987 Sep;138(3):543-50. doi: 10.1016/s0022-5347(17)43253-8.
In an anatomical study of 64 gross specimens the external striated urethral sphincter was reconfirmed to extend as a single unit from the proximal penile urethra to the bladder base. The configuration of the external striated urethral sphincter was variable and was related to the shape of the apical prostate. Two basic prostatic shapes were recognized, distinguished by the presence or absence of an anterior apical notch. Whether a notch existed depended upon the degree of lateral lobe development and the position of its anterior commissure. In radical prostatectomy knowledge of the variation in the shape of the prostatic apex can help the surgeon to achieve optimal urethral transection with maximal preservation of the external striated urethral sphincter and other tissues of the continence mechanism.
在一项对64个大体标本的解剖学研究中，再次证实外部横纹尿道括约肌作为一个单一单元从近端阴茎尿道延伸至膀胱底部。外部横纹尿道括约肌的形态各异，且与前列腺尖部的形状有关。识别出两种基本的前列腺形状，以是否存在前尖切迹区分。是否存在切迹取决于侧叶发育程度及其前联合的位置。在根治性前列腺切除术中，了解前列腺尖部形状的变异有助于外科医生实现最佳的尿道横断，最大程度地保留外部横纹尿道括约肌及其他控尿机制组织。
