# Enucleation of a Large Pseudo-Mesenteric Cyst with Hemorrhage and Infection: A Case Report

**Authors:** Takeshi Utsunomiya, Jota Watanabe, Ryo Karasudani, Naho Ishimura, Atsushi Takada, Masayuki Kanzaki, Shigehiko Yagi, Hirotsugu Yoshiyama, Satoshi Sumida, Hiromi Ohtani

PMC · DOI: 10.31662/jmaj.2025-0217 · JMA Journal · 2025-09-05

## TL;DR

A rare case of a large infected pseudo-mesenteric cyst was successfully removed without cutting the intestine, showing a novel surgical approach.

## Contribution

This case introduces enucleation as a novel surgical method for treating large infected pseudo-mesenteric cysts without intestinal resection.

## Key findings

- A 17 cm pseudo-mesenteric cyst was successfully enucleated without intestinal resection.
- The procedure was performed due to severe inflammation and vena cava compression.
- Meticulous surgical planning enabled complete removal of the cyst.

## Abstract

Pseudo-mesenteric cysts are exceptionally rare lesions, with limited reports of surgical management. This case highlights the novelty of enucleating a large infected pseudo-mesenteric cyst without intestinal resection, emphasizing its clinical significance.

We report the case of a 64-year-old man who presented with acute abdomen. Computed tomography revealed a cystic lesion approximately 17 cm in size with an enhanced capsule in the sigmoid mesentery. Emergency surgery was warranted due to severe inflammation and inferior vena cava compression. Initial laparoscopy ruled out appendiceal abnormalities, and laparotomy was performed. Careful dissection along the thickened cyst wall, as seen on preoperative imaging, enabled complete enucleation without the need for intestinal resection.

This case demonstrates successful enucleation of a giant pseudo-mesenteric cyst, a rare surgical challenge, highlighting the importance of meticulous surgical planning and technique.

## Full-text entities

- **Diseases:** cyst (MESH:D003560), inferior vena cava compression (MESH:C563013), Infection (MESH:D007239), Hemorrhage (MESH:D006470), acute abdomen (MESH:D000006), appendiceal abnormalities (MESH:D001063), Pseudo-Mesenteric Cyst (MESH:D008639), inflammation (MESH:D007249)

## Full text

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## Figures

3 figures with captions in the complete paper: https://tomesphere.com/paper/PMC12598309/full.md

## References

8 references — full list in the complete paper: https://tomesphere.com/paper/PMC12598309/full.md

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Source: https://tomesphere.com/paper/PMC12598309