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Related Experiment Video

Updated: Jun 16, 2026

Surgical Robot-Assisted Transanal Specimen Extraction Radical Sigmoidectomy Without an Auxiliary Abdominal Incision

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Rectosigmoid lithobezoar in a eight-year-old.

Mohammad Aminu Mohammad¹

¹Department of Surgery, Bayero University/Aminu Kano Teaching Hospital, Kano, Nigeria.

African Journal of Paediatric Surgery : AJPS

|January 26, 2010

Summary

A rare case of a giant colonic lithobezoar, composed of asphalt stones, was found in an eight-year-old boy with chronic constipation and pica. The bezoar was successfully removed manually through the anus.

Area of Science:

Gastroenterology
Pediatric Surgery

Background:

Bezoars are rare gastrointestinal foreign bodies, including trichobezoars (hair), phytobezoars (vegetable matter), lactobezoars (milk curds), and lithobezoars (stones).
Colonic lithobezoars are exceptionally rare, particularly in pediatric patients.

Observation:

This report details an eight-year-old boy experiencing five years of recurrent constipation and pica.
The patient presented with a giant rectosigmoid lithobezoar.

Findings:

A massive lithobezoar, consisting of 472 asphalt stones, was identified in the rectosigmoid colon.
Manual evacuation of all asphalt stone fragments via the anus was successfully performed.

Implications:

This case highlights the possibility of rare lithobezoar presentations in children with chronic constipation and pica.

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