RT Journal Article SR Electronic T1 A 48-year-old man with acute, ‘knife-like’ rectal pain JF Cleveland Clinic Journal of Medicine JO Cleve Clin J Med FD Cleveland Clinic SP 1028 OP 1029 VO 73 IS 11 A1 Rose, David Z. A1 Kedia, Navin A1 Jacob, Jesse T. A1 Tomford, J. Walton YR 2006 UL http://www.ccjm.org/content/73/11/1028.abstract AB