# Abdominal Cocoon Syndrome With Greater Omental Hypoplasia: A Rare Anatomical Insight and Diagnostic Challenge

## TL;DR

This paper describes a rare case of abdominal cocoon syndrome combined with greater omental hypoplasia, emphasizing the importance of surgical exploration for diagnosis and treatment.

## Contribution

The paper reports the first documented case of abdominal cocoon syndrome co-occurring with greater omental hypoplasia.

## Key findings

- Surgical exploration confirmed abdominal cocoon syndrome and resolved symptoms in a patient with recurrent gastrointestinal obstruction.
- The co-occurrence of greater omental hypoplasia suggests potential embryologic links to the syndrome's pathophysiology.
- Early surgical intervention proved both diagnostic and therapeutic in this challenging case.

## Abstract

Abdominal cocoon syndrome, or idiopathic sclerosing encapsulating peritonitis (SEP), is an uncommon cause of small bowel obstruction marked by the encasement of bowel loops within a dense fibrocollagenous membrane. Due to its rarity and nonspecific presentation, diagnosis is frequently delayed, particularly in patients without prior abdominal surgery or known risk factors. We report a diagnostically challenging case of a 53‐year‐old male with an 18‐month history of recurrent gastrointestinal obstruction, including bilious vomiting, oral intolerance, and epigastric pain. Multiple prior evaluations yielded inconclusive findings. Contrast‐enhanced computed tomography raised suspicion for SEP, prompting exploratory laparotomy. Intraoperative findings confirmed SEP, along with a rare anatomical anomaly—hypoplasia of the greater omentum. Surgical excision of the encasing membrane and adhesiolysis resulted in complete symptom resolution, with no recurrence at six‐month follow‐up. This case underscores the importance of clinical vigilance in recognizing abdominal cocoon syndrome and highlights the first reported co‐occurrence of SEP with greater omental hypoplasia. Surgical exploration not only confirmed the diagnosis but also achieved full recovery. The embryologic implications of omental hypoplasia may offer new insights into SEP pathophysiology and merit further investigation.

Abdominal cocoon syndrome is a rare cause of bowel obstruction. Its co‐occurrence with greater omental hypoplasia highlights a unique embryologic anomaly and reinforces the diagnostic and therapeutic value of early surgical exploration in unexplained, recurrent gastrointestinal symptoms.