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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GROSS: CARDIOVASCULAR: VASCULATURE: Circle of Willis, nervous system: Arteriosclerosis And Clipped Berry Aneurysm: Gross fixed tissue dissected circle with clip clearly shown but aneurysm is not evident atherosclerosis well shown in basilar artery