A 6-year-old boy was investigated for iron-deficiency anemia refractory to oral supplementation. He did not have a history of abdominal pain or gastrointestinal bleeding, and stool microscopy was normal. Gastroscopy and colonoscopy were normal. To exclude an occult cause of gastrointestinal bleeding, a small-bowel capsule endoscopy (CE) was undertaken. The image/video (http://links.lww.com/MPG/A42) is a luminal view of a nonobstructive intussusception occurring at 1 hour 30 minutes into the

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... l-bowel CE. It was asymptomatic and was not associated with any visible mucosal irregularity or blood in the lumen. No lead point such as a polyp was visualised during the study, and further investigations included a normal barium contrast follow-through study. No cause of his anemia has been identified to date.