The rectoprostatic fascia (Denonvilliers' fascia) is a membranous partition at the lowest part of the rectovesical pouch. It separates the prostate and urinary bladder from the rectum. It consists of a single fibromuscular structure with several layers that are fused together and covering the seminal vesicles. It is also called Denonvilliers' fascia after French anatomist and surgeon Charles-Pierre Denonvilliers.
The structure corresponds to the rectovaginal fascia in the female. The rectoprostatic fascia also inhibits the posterior spread of prostatic adenocarcinoma; therefore invasion of the rectum is less common than is invasion of other contiguous structures.
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