A 48-year-old man with acute, 'knife-like' rectal pain

David Z. Rose, MD
Department of General Internal Medicine, Cleveland Clinic

Navin Kedia, DO
The University of Arizona Sarver Heart Center, Tucson

Jesse T. Jacob, MD
Division of Infectious Diseases, Emory University School of Medicine, Atlanta, GA

J. Walton Tomford, MD
Department of Infectious Diseases, Cleveland Clinic

Address: David Z. Rose, MD, Internal Medicine Residency Program, NA10, Cleveland Clinic, 9500 Euclid Avenue, Cleveland, OH 44195; e-mail rosed@ccf.org