At the level of the sacral promontory, an areolar tissue plane begins behind the superior hemorrhoidal artery (Figure 9-3A and B).
2012, James W. Fleshman Jr., Open Total Proctocolectomy and Ileal Pouch, James W. Fleshman, Elisa H Birnbaum, Steven R Hunt, Matthew G Mutch, Ira J Kodner, Bashar Safar, Atlas of Surgical Techniques for Colon, Rectum and Anus, Elsevier (Elsevier Saunders), page 130