# Fresh Upper Gastrointestinal Bleeding (Hematemesis), a Rare Manifestation of Retrograde Intussusception Following Classic Gastric Bypass Surgery

## TL;DR

Upper gastrointestinal bleeding is a rare and potentially misleading complication of retrograde intussusception after gastric bypass surgery.

## Contribution

Highlights hematemesis as a rare and under-recognized presentation of retrograde intussusception.

## Key findings

- Retrograde intussusception can present with upper gastrointestinal bleeding, leading to misdiagnosis.
- Hematemesis is an uncommon but important clinical manifestation following gastric bypass surgery.

## Abstract

Retrograde intussusception may occur following Roux‐en‐Y gastric bypass surgery with a variety of presentations including colicky abdominal pain, constipation, and vomiting. A rare manifestation of this complication is upper gastrointestinal bleeding (hematemesis) which can cause misdiagnosis.