cases, colon Week 525: Case 1 April 26, 2023 pathadmin 1. Presented by Pedram Argani, M.D. and prepared by Jeremy Vincent M.D.This is a 48 year old male who has HIV and develops toxic megacolon after treatment with antibiotics.Ischemic colitisIdiopathic inflammatory bowel diseaseCytomegalovirus infetionPseudomembranous colitis 1. Presented by Pedram Argani, M.D. and prepared by Jeremy Vincent M.D.This is a 48 year old male who has HIV and develops toxic megacolon after treatment with antibiotics.