The Probert Encyclopaedia of Medicine

PEPTIC ULCER

A peptic ulcer is a chronic sore or crater extending through the protective mucous membrane lining and penetrating the underlying muscular tissue of the gastrointestinal tract. The areas most commonly affected are the upper part of the duodenum, the stomach. The cause of peptic ulcers is largely unknown, but stress is known to be a contributor in some cases.
Research Peptic Ulcer