Urogenital diaphragm

Tenesmus—A painful spasm of the urogenital diaphragm with an urgent desire to evacuate the bowel or bladder, involuntary straining, and the passage of little fecal matter or urine. 

Pelvic exenteration is the curative method of choice in patients with central pelvic tumor recurrence and comprises colpectomy and hysterectomy with removal of the bladder (anterior exenteration) or of the bladder and rectosigmoid (complete exenteration). In addition,the intervention maybe performed as supralevator exenteration with partial resection of the levator plate or as translevator exenteration with vulvectomy and radical resection of the levator muscle, urogenital diaphragm, and vulvoperineal... 

Postraumatic penile arterial obstruction characteristically involves the proximal portion of the dorsal penile and cavernosal arteries and the distal internal pudendal artery at the level of the urogenital diaphragm. The integrity of arterial vascular supply to the penis can be assessed by Doppler interrogation of the cavernosal arteries. A peak systolic velocity of 25 cm/s or less after prostaglandin El intracavernosal injection reflects arterial insufficiency (Fig. 12.11). 

Fig. 2.14. VCU in a 2-year-old boy with a normal urethra. The slight narrowing (large arrow) at the junction between the posterior and the anterior urethra corresponds to the urogenital diaphragm. The duct of one Cowper gland is visualized by reflux (double arrow)...

---