PEIR Digital Library

Welcome to the Pathology Education Informational Resource (PEIR) Digital Library, a multidisciplinary public access image database for use in medical education.

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HISTOLOGY: GASTROINTESTINAL: Stomach: Pyloric Muscle Hyperplasia: Micro low mag trichrome shows marked disorganization of musculature 81yo man with history gastric ulcers and now marked pyloric obstruction no ulcers at autopsy strange lesion see also