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Fig. 4A. —42-year-old man with rectal carcinoma. Comparison of pre- and postoperative MR images show pelvic plexuses are located just outside mesorectal fascia. MR image obtained before surgery (A) shows pelvic plexuses (white arrows). Postoperative MR image (B) shows one of metal hemostatic clips that were applied to inner surfaces of pelvic plexuses during surgery to mark their exact locations (black arrow).