# A case of jejunal cancer arising from ectopic pancreas

## TL;DR

A 74-year-old man was diagnosed with jejunal cancer originating from ectopic pancreatic tissue, highlighting the need to consider this rare condition in submucosal tumor diagnoses.

## Contribution

This case report presents a rare instance of cancer arising from ectopic pancreas in the jejunum.

## Key findings

- CT and DBE identified a jejunal mass with mucosal changes and luminal stenosis.
- Histopathology confirmed moderately differentiated adenocarcinoma from ectopic pancreatic tissue.
- The case emphasizes the importance of considering ectopic pancreas as a potential source of submucosal tumors.

## Abstract

A 74-year-old man presented with intestinal obstruction. CT (computed tomography) revealed a 25-mm mass in the proximal jejunum. Double-balloon endoscopy (DBE) identified a smooth, asymmetrically localized mass with oozing and luminal stenosis covered with the mucosa of swollen villi. Small bowel radiography demonstrated jejunal obstruction. Histopathological examination of the resected specimen confirmed moderately differentiated adenocarcinoma arising from ectopic pancreatic tissue of Heinrich type I. Our case suggests that cancer arising from ectopic pancreas should be considered as a candidate diagnosis of a submucosal tumor in the jejunum.