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. 2021 Dec 23;8:752523. doi: 10.3389/fmed.2021.752523

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Copyright © 2021 Liu, Gao, Han, Han, Shi, Liu and Li.

This is an open-access article distributed under the terms of the Creative Commons Attribution License (CC BY). The use, distribution or reproduction in other forums is permitted, provided the original author(s) and the copyright owner(s) are credited and that the original publication in this journal is cited, in accordance with accepted academic practice. No use, distribution or reproduction is permitted which does not comply with these terms.

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Left mandible biopsy and immunohistochemistry. (A) Multiple fragments of a squamous mucosa and soft tissue with a dense lymphoid infiltrate (×100 magnification). (B) Aggregate of atypical lymphoid cells (H&E staining; ×200 magnification). (C) Immunohistochemical staining showing sheets of large mononuclear lymphoid cells positive for CD20 (×100 magnification). (D) Sheets of large mononuclear lymphoid cells positive for CD79a (×100 magnification). (E) Cells positive for Bcl-2 staining (×100 magnification). (F) Cells positive for Ki67 staining (×100 magnification).