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: HEART: Aortic Stenosis Unicuspid: Gross natural color unopened valve shown from aorta excellent photo said to be due to rheumatic disease but evidence far from convincing looks like a unicuspid valve