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 Valve Prosthesis Heterograft: Gross natural color excised valve which had been in place for nine years shows marked thickening of cusps and nodular calcification excellent photo better than other one in this file