Volume 41, Issue 5 pp. 335-348
Original Article

Primary central nervous system lymphomas with massive intratumoral hemorrhage: Clinical, radiological, pathological, and molecular features of six cases

Seiji Yamada

Corresponding Author

Seiji Yamada

Department of Diagnostic Pathology, Fujita Health University School of Medicine, Toyoake, Japan

Correspondence: Seiji Yamada, MD, PhD, Department of Diagnostic Pathology, Fujita Health University School of Medicine 1-98 Dengakugakubo, Kutsukake-cho, Toyoake, Aichi 470-1192, Japan. Email: [email protected]

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Jun Muto

Jun Muto

Department of Neurosurgery, Fujita Health University School of Medicine, 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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Kazuya Shiogama

Kazuya Shiogama

Division of Morphology and Cell Function, Faculty of Medical Technology, Fujita Health University School of Health Sciences, Toyoake, Japan

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Yuta Tsuyuki

Yuta Tsuyuki

Department of Pathology and Laboratory Medicine, Nagoya University Hospital, Nagoya, Japan

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Akira Satou

Akira Satou

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

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Shigeo Ohba

Shigeo Ohba

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

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Kazuhiro Murayama

Kazuhiro Murayama

Joint Research Laboratory of Advanced Medical Imaging, Fujita Health University School of Medicine, Toyoake, Japan

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Yasuo Sugita

Yasuo Sugita

Department of Neuropathology, St. Mary's Hospital, Kurume, Japan

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Shigeo Nakamura

Shigeo Nakamura

Department of Pathology and Laboratory Medicine, Nagoya University Hospital, Nagoya, Japan

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Hideaki Yokoo

Hideaki Yokoo

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

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Akihiro Tomita

Akihiro Tomita

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

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Yuichi Hirose

Yuichi Hirose

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

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Tetsuya Tsukamoto

Tetsuya Tsukamoto

Department of Diagnostic Pathology, Fujita Health University School of Medicine, Toyoake, Japan

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Masato Abe

Masato Abe

Department of Pathology, School of Health Sciences, Fujita Health University, Toyoake, Japan

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First published: 13 July 2021
Citations: 3

Abstract

Primary central nervous system lymphomas (PCNSLs) rarely exhibit intratumoral hemorrhage. The differential diagnosis of hemorrhagic neoplasms of the central nervous system (CNS) currently includes metastatic carcinomas, melanomas, choriocarcinomas, oligodendrogliomas, and glioblastomas. Here we present the clinical, radiological, pathological, and molecular genetic features of six cases of PCNSL associated with intratumoral hemorrhage. The median age of patients was 75 years, with male predominance. While conventional PCNSLs were associated with low cerebral blood volume (CBV), perfusion magnetic resonance imaging (MRI) revealed elevated CBV in three cases, consistent with vascular proliferation. All six cases were diagnosed pathologically as having diffuse large B-cell lymphoma (DLBCL) with a non-germinal center B-cell-like (non-GCB) phenotype; marked histiocytic infiltrates and abundant non-neoplastic T-cells were observed in most cases. Expression of vascular endothelial growth factor and CD105 in the lymphoma cells and the small vessels, respectively, suggested angiogenesis within the neoplasms. Neoplastic cells were immunohistochemically negative for programmed cell death ligand 1 (PD-L1), while immune cells in the microenvironment were positive for PD-L1. Mutations in the MYD88 gene (MYD88) (L265P) and the CD79B gene (CD79B) were detected in five and one case, respectively. As therapeutic modalities used for PCNSLs differ from those that target conventional hemorrhagic neoplasms, full tissue diagnoses of all hemorrhagic CNS tumors are clearly warranted.

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