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: MUSCULOSKELETAL: BONES: JOINTS: VERTEBRA: Herniated Nucleus Pulposus: Gross natural color frontal sectioned vertebral bodies showing extrusion of disc nuclei into marrow with surrounding sclerosis of bone excellent