# A case of Meckel’s diverticulum misdiagnosed as gastrointestinal stromal tumor: case report and literature review

## TL;DR

A 17-year-old girl with Meckel’s diverticulum was initially misdiagnosed with a gastrointestinal stromal tumor due to similar imaging features, highlighting the need for histopathology in accurate diagnosis.

## Contribution

This case emphasizes the diagnostic challenges between Meckel’s diverticulum and GIST and underscores the importance of histopathology for accurate diagnosis.

## Key findings

- Meckel’s diverticulum can mimic gastrointestinal stromal tumors in imaging, leading to misdiagnosis.
- Histopathological confirmation is essential for distinguishing between MD and GIST.
- Laparoscopic resection provided a definitive diagnosis and treatment in this case.

## Abstract

Meckel’s diverticulum (MD) is a common congenital gastrointestinal malformation often containing ectopic gastric mucosa. It is prone to ulceration and painless lower gastrointestinal bleeding, predominantly affecting children and adolescents. Gastrointestinal stromal tumors (GISTs), which arise from Cajal interstitial cells, are predominantly mesenchymal tumors that occur predominantly in middle-aged and elderly individuals. Both conditions may occur in the small intestine, presenting gastrointestinal bleeding and exhibiting overlapping imaging features, which pose challenges for clinical differentiation. This report describes a 17-years-old female patient admitted to the First Hospital of Jilin University with intermittent melena, abdominal pain, and anemia. Small bowel CT imaging (CTE) revealed a nodular lesion measuring approximately 0.9 cm × 1.8 cm within the ileal lumen. The lesion exhibited a broad base attached to the intestinal wall and showed marked homogeneous enhancement, strongly suggesting a GIST. Previous gastrointestinal endoscopy had only indicated chronic gastritis and colitis. The patient underwent laparoscopic segmental resection of the ileal mass. Postoperative pathology confirmed an MD with fundic gland-type ectopia. This case highlights the diagnostic challenges of complex MD and underscores the critical role of histopathology. It thereby provides diagnostic and surgical guidance for MD cases that mimic GIST on imaging, thereby reducing misdiagnosis.