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. 2021 Aug;11(4):1013–1019. doi: 10.21037/cdt-21-147

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LV endomyocardial biopsy. (A) HE staining (×100) displaying endomyocardial and myocardial lymphocytic infiltrates. Arrow: lymphocitic infiltrate. (B) Myocardial biopsy shows lymphocytic infiltrate with eosinophils and myocyte damage (HE, ×400). Arrow: lymphocitic infiltrate. * indicates eosinophil infiltrate. (C) Positive immunostain CD3 ×400 (polyclonal anti-CD3; Dako omnis). Arrow: CD3+ T lymphocyte. (D) Negative immunostain CD20 ×400 (L26; Dako Omnis). LV, left ventricular; HE, hematoxylin-eosin.