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Case Reports
. 2024 Aug;116(4):242-248.
doi: 10.32074/1591-951X-944.

Fibrin associated large B-cell lymphoma accidentally identified in a breast implant capsule: a molecular report of a rare entity

Affiliations
Case Reports

Fibrin associated large B-cell lymphoma accidentally identified in a breast implant capsule: a molecular report of a rare entity

Cristian Scatena et al. Pathologica. 2024 Aug.

Abstract

Breast implant-associated (BIA) lymphoma is a rare malignancy, typically originating from T-cells; however, few cases of diffuse large B-cell lymphoma (LBCL) have been recently described. These cases share major features: Epstein-Barr virus positivity and a favorable prognosis with surgical intervention alone, hinting at a potential link to fibrin-associated LBCL (FA-LBCL). This study presents the first case of BIA-FA-LBCL in Italy and one of the few assessed from a molecular standpoint so far. We identified two pathogenic mutations in DNMT3A and a variant of uncertain significance (VUS) in JAK2. These findings suggest that dysfunctional epigenetic mechanisms and constitutive activation of the JAK-STAT pathway may underpin BIA-FA-LBCL lymphomagenesis. Finally, we summarized all the previously reported cases in alignment with the updated WHO-HAEM5 classification, shedding further light on the nature of this new entity. This report highlights the rarity of BIA-FA-LBCL and underscores the importance of comprehensive capsule sampling and reporting to national databases for accurate characterization and management of these lymphomas. The study supports the classification of BIA-FA-LBCL within the spectrum of FA-LBCL, emphasizing the need for further research to elucidate its molecular underpinnings and improve clinical outcomes.

Keywords: breast implant associated lymphoma; fibrin associated-large B cell lymphoma; non-Hodgkin lymphoma.

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Conflict of interest statement

C.S. has received honoraria for consulting, advisory role, speaker bureau and/or research grants from Bristol Myers Squibb, Astra Zeneca, Daiichi-Sankyo, Gilead, Roche SPA and Novartis. A.D.N. has received honoraria for consulting from Novartis, Menarini, Incyte, EusaPharma and research grants from the Italian Ministry of Health. G.N.F has received honoraria for advisory role from Astra Zeneca.

Figures

Figure 1.
Figure 1.
Schematic representation of the morphological and immunophenotypical features of the current case. (A-B) Small clusters of large, atypical, and pleomorphic lymphocytes with prominent nucleoli distributed within the capsule and associated with fibrin deposits and necrosis (A-B hematoxylin & eosin). Immunoreactivity for CD20 (C), EBER-ISH (D), BCL2 (E), CD30 (F), MUM1 (G). Proliferation index (Ki-67): 90% (H). A gross investigation of the total capsulectomy showed areas of hemorrhage and myxoid necrosis, and a smooth and pale surface, without fluid content and/or tumor mass (I). Magnification of A, C-H: 100X. Magnification of B: 40X. Scalebar of A-H: 100 μm. Scalebar of I: 1 cm.
Figure 2.
Figure 2.
Oncoplot summarizing the major molecular features of the current case compared to literature.

References

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