Laparoscopic Removal of an Abdominal Peritoneal Inclusion Cyst in a Pediatric Patient: A Case Report

Lilly Fernandes, Meagan Rosenberg, Rahul Jawale, Michal Tirabassi
In: Journal of Pediatric Surgery Case Reports · 2026 · vol. 133 , pp. 103322 · doi:10.1016/j.epsc.2026.103322 · W7203986419
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A case report describes the successful laparoscopic resection of a perihepatic peritoneal inclusion cyst in a sixteen-year-old girl, which resolved her chronic abdominal pain.

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Abstract

Introduction Peritoneal inclusion cysts (PIC) are benign fluid filled mesothelial-lined cysts that can be found within the abdominal or pelvic cavities. They are most common in the pelvic cavity of premenopausal women secondary to inflammatory processes including abdominal surgery, inflammatory bowel disease, or pelvic inflammatory disease. Case Report This case report presents a unique case of a sixteen-year-old girl with acute on chronic abdominal pain. She presented to the emergency department with nine days of worsening right hemi-abdominal pain and radiographic evidence of bowel wall thickening and edema of the ascending colon near the hepatic flexure with an associated fluid collection concerning for a new infectious or inflammatory bowel disease process. Subsequent endoscopic and MRI findings did not correlate with this suspicion. They identified a simple, non-invasive perihepatic cyst between the right liver lobe and posterolateral abdominal wall measuring 3.6x1.4x2.6cm. She was referred to pediatric surgery and underwent laparoscopic mass resection with a combination of sharp and blunt dissection to achieve grossly negative margins. Final pathology was consistent with an inclusion cyst causing suspected impingement on an intercostal nerve bundle. Post-resection, she had resolution of her chronic abdominal pain both at her one month and one year follow up. Conclusion Peritoneal inclusion cyst should be included in the differential diagnosis of adolescents who develop abdominal pain. Laparoscopic resection should be considered as a potential modality of treatment.

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