EDITOR—Closed duodenal injury is a good topic to highlight as a lesson of the week. Surgical injuries to the upper abdomen are a fairly rare childhood injury, and few doctors will diagnose them with the necessary speed.1 Lam et al remind us to examine the paediatric abdomen carefully and frequently after blunt trauma and not to rely too heavily on imaging.

One other type of intra-abdominal damage caused by handlebar …