[Squamous metaplasia of the gastric mucosa associated with an aberrant pancreas].

A squamous metaplasia was found in the superficial regenerative epithelium on the aberrant pancreas tissue (Heinrich type II), situated in the posterior wall of the antrum. The squamous epithelium was positively stained by keratin, according to the PAP method, and intestinal metaplasia also was found surrounding the squamous metaplasia. In this case, it was decided that the squamous metaplasia development was associated with the regenerative change of the superficial ulceration. Squamous metaplasia is extremely rare in the stomach, and thus it was difficult to consider that the adenosquamous cell carcinoma of the stomach had developed from the antecedent squamous metaplasia.