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Epicardial coronary arteries with AV showing distinct patterns of B cell and plasma cell infiltrates. A–C; Immunohistochemistry staining with CD20 showing B cell infiltrates as adventitial nodules (A–C), diffuse adventitial infiltrates (B), or neointimal infiltrates (A). D; Immunohistochemistry staining with syndecan-1 showing plasma cell infiltrates in the sclerotic adventitia. A–D; 2X. Insets; 20X.
