ineum are uncommon, a knowledge of its anatomy and expected pathologic entities is useful which interpreting CT and MR images. The purpose of this article is to demonstrate the CT and MR imaging anatomy of the perineum and to review the imaging findings of a spectrum of pathologic processes that affect this anatomic region. These processes include primary tumors, such as aggressive angiomyxoma,...

Submit Manuscript | http://medcraveonline.com MOJ Surg 2015, 2(2): 00016 the retrorectal or presacral space [4] and rarely in the perirenal area [2,3,5], the subcutaneous tissue in the anorectal region [6] and more rarely in the prerectal location. Microscopically, the tailgut cyst is characterized by the presence of a cysts lined with varying types of epithelium; columnar, mucin secreting epit...