# SARS-CoV-2 as a potential trigger for microscopic colitis in a young adult: A case report

## TL;DR

A young adult developed chronic diarrhea after a SARS-CoV-2 infection, which was later diagnosed as lymphocytic colitis and successfully treated with budesonide.

## Contribution

This case report suggests SARS-CoV-2 may trigger microscopic colitis, highlighting a potential post-COVID-19 gastrointestinal complication.

## Key findings

- Chronic diarrhea and abdominal pain persisted for 10 months after SARS-CoV-2 infection.
- Colonoscopy biopsies showed moderate lymphocytic infiltration consistent with lymphocytic colitis.
- Symptoms resolved completely with budesonide treatment.

## Abstract

This case highlights the potential role of SARS-CoV-2 in triggering lymphocytic colitis, emphasizing the need for further research and vigilance in identifying potential post-COVID-19 GI complications. We describe a case of a young adult who experienced chronic diarrhea and abdominal pain for 10 months after a SARS-CoV-2 infection. Extensive laboratory and imaging investigations yielded no significant findings. Despite a preliminary diagnosis of irritable bowel syndrome and symptomatic treatment, symptoms persisted. Colonoscopy with biopsies revealed unremarkable colonic mucosa but confirmed moderate lymphocytic infiltration consistent with lymphocytic colitis. Treatment with budesonide achieved complete symptom resolution. The findings underscore the importance for clinicians to consider triggered microscopic colitis in patients presenting with persistent diarrhea following SARS-CoV-2 infection.