Recurrent gastrointestinal hemorrhage: an unusual cause.

A young man presented with gastrointestinal bleeding which necessitated a partial gastrectomy. No lesion was discovered in the stomach or duodenum. Subsequently episodes of hemorrhage recurred. Barium studies and blood investigations failed to reveal the cause. The observation of skin lesions on the neck led to the diagnosis of pseudoxanthoma elasticum. The importance is stressed of examining the skin in any case of alimentary bleeding of obscure origin.