Colitis - Differential Diagnosis by Segment Location Ascending Colon: - Shigella - Salmonella - Amebic colitis Hepatic flexure: - Ischemia (Watershed) Cecum and Appendix: - Shigella - Salmonella - Amebic colitis - Appendicitis - Typhlittis (neutropenia) Descending Colon: - Schistosomiasis Terminal Ileum - Yersinia - TB Recto-Sigmoid: - Herpes - Gonorrhea - C. trachomatis Pan-Colitis: - CMV - C Diff - Lymphoma - E Coli Rectum: - Radiation #Colitis #Segment #Location #Differential #Diagnosis #Map #Causes