# Neonatal mesenteric cyst in a 5-day-old patient: a case report

## TL;DR

A 5-day-old baby had a rare mesenteric cyst causing intestinal blockage, successfully treated with surgery.

## Contribution

Reports an early neonatal mesenteric cyst case with successful surgical management and no recurrence.

## Key findings

- Mesenteric cyst in a 5-day-old infant presented with intestinal obstruction symptoms.
- Surgical excision of the cyst led to full recovery with no malignancy or recurrence after 1.5 years.
- Early neonatal mesenteric cysts are rare and should be considered in differential diagnosis of bowel obstruction.

## Abstract

Mesenteric cysts have been documented as a rare occurrence in children. They are mostly renowned to be benign intra-abdominal tumors with no known etiology. The symptoms are non-specific ranging from being asymptomatic to an acute abdomen. Most of the diagnoses are made below the age of 10 years with devoid of reports for the early neonatal occurrences. We report a case of an early neonatal mesenteric cyst in a 5-day-old female patient who presented with signs of intestinal obstruction markedly by abdominal distension, vomiting, and absolute constipation. Abdominal X-ray showed evidence of small bowel obstruction while abdominal ultrasound and computed tomography (CT) scan were used to reach the diagnosis of a mesenteric cyst, all laboratory baseline investigations were within a normal range. On laparotomy a 12 by 13 cm cyst that was firmly adhering to the proximal ileal wall was meticulously dissected, complete cystectomy was done with no segmental resection. Histopathologically there were no signs of malignancy and the patient successfully recovered with no signs of recurrences after being followed for a year and a half. Being a rare case in the early neonatal period with unspecific presentations; mesenteric cyst should be considered as one of the diagnoses best to be managed by surgical excision to prevent recurrences.