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Intravascular large B‐cell lymphoma (IVLBCL) is a distinct disease, but the neoplastic PD‐L1 expression on tumor cells may vary among cases. We evaluated 10 IVLBCL autopsy cases for neoplastic PD‐L1 expression, and had positive results in two cases. In one case, neoplastic PD‐L1 expression (SP142, 28‐8, and E1J2J clones) was dependent on the organ and anatomical site (capillaries vs. vessels) of...
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