this study reviews the findings in 18 consecutive patients with a variety of perirectal pathologies including rectal carcinoma ( 3 ) , gynecologic neoplasm ( 8 ) , sacral lesions ( 2 ) , pelvic arteriovenous malformations ( 2 ) , inflammatory bowel disease ( 2 ) , and a pelvic kidney ( 1 ) .
C0036037
sacral
C0030797
pelvic