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: CARDIOVASCULAR: VASCULATURE: Artery: Polyarteritis Nodosa Healed Lesion: Micro low mag Weigert van Gieson excellent example of focal destruction of arterial media with aneurysm now filled in by proliferated intimal cells or organized thrombus case also has acute lesions