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Updated: May 21, 2026

Handheld Metal Detector Screening for Metallic Foreign Body Ingestion in Children
Published on: September 11, 2018
Magnet-associated intestinal perforation results in a new institutional policy of ferromagnetic screening prior to
Hayley Baines1, Nicholas C Saenz, Christopher Dory
1Phoenix Children's Hospital, Phoenix, AZ, USA.
Abstract:
Foreign body ingestions are common and the vast majority pass through the gastrointestinal tract without complication. Some ingestions, however, result in serious morbidity and mortality. We present a case in which the patient's chief complaint of severe posterior neck pain was unrelated to his foreign body ingestion (multiple magnets). The ingestion of magnets was not disclosed by the child to either the providing medical team or to the patient's family. In order to evaluate the patient's complaint of severe focal neck pain, MRI of the neck was performed. The authors believe it to be feasible that the MRI scan resulted in intestinal perforations that might not have occurred during the natural course of the ingestion. This complication might have been prevented if the patient had undergone screening with a ferromagnetic detector prior to entering the MRI suite. Because of the serious complications related to this case, all pediatric patients at our institution are now screened with ferromagnetic detectors prior to entering the MRI suite. We encourage nationwide policy revision to prevent further incidents similar to the one described in this case.
Insights
Pediatric foreign body ingestion of magnets can lead to severe complications. Screening with ferromagnetic detectors before MRI scans is crucial to prevent iatrogenic injuries in children.
Area of Science:
- Pediatric radiology
- Gastroenterology
- Medical device safety
Background:
- Foreign body ingestions are common in children, with most passing without issue.
- However, certain ingestions, like magnets, can cause serious gastrointestinal complications.
- Undisclosed ingestions pose diagnostic and management challenges.
Observation:
- A child presented with severe neck pain, unrelated to an undisclosed ingestion of multiple magnets.
- Magnetic resonance imaging (MRI) of the neck was performed to evaluate the neck pain.
- The MRI scan is suspected to have caused intestinal perforations.
Findings:
- The patient's undisclosed magnet ingestion led to a suspected iatrogenic complication during MRI.
- Ferromagnetic detector screening prior to MRI could have prevented this intestinal perforation.
- This case highlights the risks associated with magnetic foreign bodies and MRI.
Implications:
- Instituting mandatory ferromagnetic detector screening for all pediatric patients before MRI is essential.
- This policy change aims to prevent similar serious complications from magnetic ingestions.
- Nationwide policy revision is recommended to enhance patient safety in pediatric imaging.
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