Volume 75, Issue 1 pp. 11-20
ORIGINAL ARTICLE

Primary large B-cell lymphoma of the central nervous system: A reappraisal of CD5-positive cases based on clinical, pathological, and molecular evaluation

Seiji Yamada

Corresponding Author

Seiji Yamada

Division of Analytical Pathology, Oncology Innovation Center, Research Promotion Headquarters, Fujita Health University School of Medicine, Toyoake, Japan

Department of Neurosurgery, Nagoya City University Graduate School of Medical Sciences, Nagoya, Japan

Correspondence Seiji Yamada, MD, PhD, Research Promotion Headquarters, Division of Analytical Pathology, Oncology Innovation Center, Fujita Health University School of Medicine, 1-98 Dengakugakubo, Kutsukake-cho, Toyoake, Aichi, 470-1192, Japan.

Email: [email protected]

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Akira Satou

Akira Satou

Department of Surgical Pathology, Aichi Medical University Hospital, Nagakute, Japan

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Yuta Tsuyuki

Yuta Tsuyuki

Center for Clinical Pathology, Fujita Health University Hospital, Toyoake, Japan

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Sachiko Iba

Sachiko Iba

Department of Hematology, Fujita Health University School of Medicine, Toyoake, Japan

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Yuka Okumura

Yuka Okumura

Department of Pathology and Laboratory Medicine, Nagoya University Graduate School of Medicine, Nagoya, Japan

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Eri Ishikawa

Eri Ishikawa

Department of Gastroenterology and Hepatology, Nagoya University Graduate School of Medicine, Nagoya, Japan

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Hideaki Ito

Hideaki Ito

Department of Pathology, Aichi Medical University, Nagakute, Japan

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Yasunori Kogure

Yasunori Kogure

Division of Molecular Oncology, National Cancer Center Research Institute, Tokyo, Japan

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Naoe Goto

Naoe Goto

Department of Hematology, Fujita Health University School of Medicine, Toyoake, Japan

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Motoki Tanikawa

Motoki Tanikawa

Department of Neurosurgery, Nagoya City University Graduate School of Medical Sciences, Nagoya, Japan

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Kazuyuki Shimada

Kazuyuki Shimada

Department of Hematology and Oncology, Nagoya University Graduate School of Medicine, Nagoya, Japan

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Tetsuya Tsukamoto

Tetsuya Tsukamoto

Division of Analytical Pathology, Oncology Innovation Center, Research Promotion Headquarters, Fujita Health University School of Medicine, Toyoake, Japan

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Kennosuke Karube

Kennosuke Karube

Department of Pathology and Laboratory Medicine, Nagoya University Graduate School of Medicine, Nagoya, Japan

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Hideaki Yokoo

Hideaki Yokoo

Department of Human Pathology, Gunma University Graduate School of Medicine, Gunma, Japan

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Keisuke Kataoka

Keisuke Kataoka

Division of Molecular Oncology, National Cancer Center Research Institute, Tokyo, Japan

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Akihiro Tomita

Akihiro Tomita

Department of Hematology, Fujita Health University School of Medicine, Toyoake, Japan

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Mitsuhito Mase

Mitsuhito Mase

Department of Neurosurgery, Nagoya City University Graduate School of Medical Sciences, Nagoya, Japan

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Shigeo Nakamura

Shigeo Nakamura

Department of Pathology and Laboratory Medicine, Nagoya University Graduate School of Medicine, Nagoya, Japan

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First published: 11 December 2024

Abstract

CD5 expression is seen in 5%–10% of de novo diffuse large B-cell lymphomas (DLBCLs). Primary large B-cell lymphoma of the central nervous system (PCNS-LBCL) also exhibits CD5 expression in a minority of cases, however, clinicopathological and molecular features remain largely unclarified. Here we present the clinical, molecular, and pathological features of 11 CD5-positive (+) PCNS-LBCL cases, occupying 6.7% of all 165 PCNS-LBCLs diagnosed in our institutions. While CD5+ systemic DLBCL has been recognized as a distinctive subgroup showing an aggressive clinical course, no obvious differences were found between CD5+ and CD5-negative subgroups among the present CNS patients clinically. MYD88 p.L265P and CD79B p.Y196 mutations were detected in eight (73%) and seven (64%) cases, respectively, supporting previous reports. Notably, the microenvironmental immune cells were universally PD-L1/CD274-positive, and the higher levels tended to present favorable overall survival, as already evidenced in the PCNS-LBCL series. In contrast, neoplastic PD-L1/CD274 expression was undetectable in all cases. Indeed, no structural variations or copy number alterations involving PD-1 ligands were detected by targeted-capture sequencing and fluorescence in situ hybridization. While further studies are warranted, we may have confirmed similarity between PCNS-LBCLs and intravascular large B-cell lymphomas from a molecular standpoint.

CONFLICT OF INTEREST STATEMENT

None declared.

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