# A Rare Case of a Neuroendocrine Tumor at the Duodenum

## TL;DR

This paper presents a rare case of a neuroendocrine tumor in the duodenum of a 77-year-old man and details its diagnosis and treatment.

## Contribution

The novelty lies in describing a rare duodenal bulb NET case with a detailed diagnostic and management approach.

## Key findings

- A well-differentiated neuroendocrine tumor was diagnosed in the duodenal bulb of a 77-year-old man.
- Endoscopy, biopsies, and immunohistochemistry confirmed the tumor's presence and characteristics.
- Treatment involved a combination of endoscopic, surgical, and medicinal procedures.

## Abstract

Neuroendocrine tumors (NETs) are slow-growing cancers derived from neuroendocrine cells that typically affect the pancreas, lungs, and gastrointestinal tract. A rare form can develop in the duodenum and can be difficult to diagnose and treat. The case below describes a rare incidence of a well-differentiated duodenal bulb NET in a 77-year-old man who had early satiety and persistent dyspepsia. Endoscopy, biopsies, and immunohistochemistry staining were used to confirm the diagnosis. According to the features of the tumor, management techniques, including endoscopic, surgical, and medicinal procedures, are being implemented.