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A 23-year-old woman presented with abdominal pain and iron-deficiency anaemia. She had recently used a non-steroidal anti-inflammatory for flu-like illness and had been taking oral iron supplementation for the last month.
What is the abnormality shown in the endoscopic photograph and accompanying histology slide, and how is this condition managed?
The endoscopic image shows an area of mucosal pallor in the gastric antrum. Histological examination showed features of a reactive gastropathy, chronic gastritis and iron deposition within the surface epithelium, in keeping with a diagnosis of iron pill gastritis.
Iron pill gastritis is a recognised complication of iron supplementation but is uncommonly reported. The diagnosis should be considered when unexpected abnormalities are found in the upper GI tract, in patients receiving oral iron therapy. Endoscopic features include yellow-brown streaks, erythematous gastritis, erosions, ulceration and polypoidal abnormalities.1
In a large series, iron deposition was found in 0.9% of upper GI endoscopies (12/1300), and iron medication-associated mucosal injury was found in 0.7% (9/1300).2 Mucosal injury correlated with the degree of iron accumulation.2
Oral iron damage to the GI mucosa is thought to occur in focal areas where iron concentration exceeds the capacity for normal absorption.3 Oxygen free radicals then cause cell death and tissue necrosis.1 4
The treatment of iron pill gastritis is discontinuation of iron tablets, switching to liquid formulation (which avoids the concentration-dependent local effect on the mucosa possible with tablets) or parenteral administration. Our patient was asymptomatic at follow-up, with normalised haemoglobin.
Contributors KB drafted the manuscript. MH provided the histology slide and interpretation. IE critically revised the manuscript.
Competing interests None declared.
Provenance and peer review Not commissioned; externally peer reviewed.
Patient consent for publication Not required.
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