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



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