Imaging Findings of Perineal Disease

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, rhabdomyosarcoma and leiomyosarcoma; secondary involvement by anal or urethral neoplams; congenital and acquired cystic lesions, such as tailgut cyst, Bartholin’s duct cyst, lymphocele and mucocele; and inflammatory lesions.