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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MONTAGE: JOINT: Course of Rheumatoid Arthritis, Biopsy and arthroscopy of synovium -- MIDDLE STAGES; Upper image-biopsy; lower image-arthroscopy -- BIOPSY-There is excessive fibrous tissue, more synovial surface cells, excessive vasculature, often with perivascular infiltrates of round cells, and both round and inflammatory cell infiltrati