An unexpected cause of iron deficiency detected by capsule endoscopy.

A 52-year-old woman was referred to our hospital for analysis of iron deficiency anaemia. Her medical history revealed extirpation of a meningeoma, Graves’ disease and atrial fibrillation. She had no complaints. Physical examination was normal. Laboratory investigations revealed microcytic anaemia (haemoglobin 7.3 mmol/l, mean cell volume 76 fl) and iron deficiency (ferritin 15 μg/l, normally >30). Upper gastrointestinal endoscopy, including duodenal biopsies, and ileocolonoscopy were performed, revealing no abnormalities. A video capsule endoscopy was subsequently performed using the Given system to evaluate the small bowel for a possible bleeding source. Capsule endoscopy revealed abnormal findings (figure 1).