Recurrent cytomegalovirus colitis: a rare case of immune reconstitution inflammatory syndrome

Cytomegalovirus (CMV) colitis usually occurs in patients with advanced immunosuppression when the CD4 count is <50 cells/μL. We reported a case of recurrent CMV colitis in a patient with HIV who presented with profuse lower gastrointestinal bleed. This was a case of immune reconstitution inflammatory syndrome (IRIS) manifesting as CMV colitis and has been reported only once in the literature previously. This patient had a CD4 count of 157 cells/μL and undetectable viral load after being on antiretroviral therapy (ART) for 5 months, which was consistent with IRIS. The diagnosis of CMV was confirmed by a colonoscopy and a biopsy. This case highlights the fact that CMV colitis can manifest despite a moderately preserved CD4 count and the clinicians must have a high index suspicion for IRIS syndrome especially when someone was recently started on ART. Since effective treatment is available, it is important not to miss the diagnosis of CMV colitis.