Article

A Rare Cohesive Cytomorphology in Primary Histiocytic Sarcoma of Bone Marrow with PD-L1 Expression: A case report and systemic literature review

2026-03-11

Abstract excerpt

<title>Abstract</title> <p> <bold>Background:</bold> Histiocytic sarcoma (HS) is a rare hematologic malignancy. Primary bone marrow (BM) HS with cohesive clustered cytomorphology is rarely reported, posing diagnostic challenges. Herein, we report a case of atypical BM HS, which was confirmed by immunohistochemistry and had PD-L1 expression. <bold>Case presentation:</bold> A 66-year-old female presented with f...

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Literature Corpus work: 99d84522-974e-5bfe-9913-5389a9dee795
DOI: 10.21203/rs.3.rs-8951391/v1

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