Retrorectal or presacral tumors are rare. The retrorectal space lies between the upper rectum and the sacrum. It is limited anteriorly by the fascia propria of the rectum, posteriorly by the presacral fascia, and laterally by the ureters and iliac vessels. It is limited inferiorly by the rectosacral fascia and communicates superiorly with the retroperitoneal space. The rectosacral fascia isolates the retrorectal space from the supralevator space. The latter is a horseshoe-shaped space limited anteriorly by Denonvilliers’ fascia and below by the levator ani. The retrorectal space is made up of loose connective tissue, but may contain different embryological remnants.
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