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Updated: Feb 9, 2026

Biodegradable Magnesium Stent Treatment of Saccular Aneurysms in a Rat Model - Introduction of the Surgical Technique

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A Magnesium Oxide Bezoar.

Masaya Iwamuro¹, Shunsuke Saito², Masao Yoshioka²

¹Department of Gastroenterology and Hepatology, Okayama University Graduate School of Medicine, Dentistry and Pharmaceutical Sciences, Japan.

Internal Medicine (Tokyo, Japan)

|June 8, 2018

Summary

A rare case of gastric pharmacobezoar, primarily magnesium oxide, was found in an elderly woman. This highlights the importance of considering pharmacobezoars in patients with radiopaque masses and a history of magnesium oxide use.

Keywords:

bezoar esophagogastroduodenoscopy laxative magnesium oxide

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Area of Science:

Gastroenterology
Radiology
Pharmacology

Background:

Pharmacobezoars are rare gastrointestinal concretions.
Magnesium oxide is commonly used for its laxative properties.

Observation:

A 75-year-old woman presented with nausea and appetite loss.
Computed tomography revealed a radiopaque gastric mass.
Endoscopy identified and retrieved bezoars composed mainly of magnesium oxide.

Findings:

The gastric bezoars were successfully removed endoscopically.
The bezoars were predominantly composed of magnesium and oxide.

Implications:

Pharmacobezoar should be considered in the differential diagnosis of radiopaque gastrointestinal masses.
A history of magnesium oxide consumption is a key factor in diagnosis.