Abstract
Background
Lymphomas affecting the sublingual glands are extremely rare and very few case reports are currently available. Therefore, the aim of the current study is to describe the clinicopathological features of a series of lymphomas involving the sublingual glands.
Methods
Cases diagnosed in four pathology services were assessed and the formalin-fixed paraffin-embedded tissue blocks were retrieved for diagnosis confirmation. Clinical data were obtained from patients’ medical files.
Results
We obtained seven cases of lymphomas in the sublingual glands, representing two follicular lymphomas, two diffuse large B cell lymphomas not otherwise specified (DLBCL NOS), two extranodal marginal zone B cell lymphoma of mucosa-associated lymphoid tissue (MALT lymphomas) and one mantle cell lymphoma (MCL). In all cases the tumor cells infiltrated the glandular parenchyma, although in two of them the neoplastic cells were located more superficially and permeated the glandular acini and ducts. Clinically, the tumors presented as asymptomatic nodules and two patients (affected by DLBCL NOS and MCL) died, while the other five patients remained alive at last follow-up.
Conclusion
Lymphomas affecting the sublingual glands are usually of the mature B cell lineage, often represent low-grade subtypes and may clinically resemble other more common lesions in the floor of the mouth like salivary gland tumors.
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Data Availability
The manuscript has no further associated data in a data repository.
Code Availability
Not applicable.
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Funding
This study was supported by the Coordenação de Aperfeiçoamento de Pessoal de Nível Superior (CAPES/Brazil, Finance Code 001), the São Paulo State Research Foundation (FAPESP/Brazil) (FAPESP #17/14880-3), the Minas Gerais State Research Foundation (FAPEMIG) and the Conselho Nacional de Desenvolvimento Científico e Tecnológico (CNPq/Brazil).
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FPF: Study concepts, FPF: Study design, GRdA, ALM-P, CVBLdC, MAL, JMA-U, RC, ER, WFPvH, LR, HARP, BABdA, CDS: Data acquisition, FPF, RSG, CDS: Quality control of data and algorithms, FPF, BABdA, RSG: Manuscript editing, All authors: Manuscript review.
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The questionnaire and methodology for this study was approved by the Human Research Ethics committee of the Universidade Federal de Minas Gerais (CAAE: 58900722.1.0000.5149).
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Roman Carlos was deceased on November 5th, 2021, but his earlier contributions to this article remains significant.
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de Araújo, G.R., Morais-Perdigão, A.L., de Cáceres, C.V.B.L. et al. Lymphomas Affecting the Sublingual Glands: A Clinicopathological Study. Head and Neck Pathol 17, 154–164 (2023). https://doi.org/10.1007/s12105-022-01489-8
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DOI: https://doi.org/10.1007/s12105-022-01489-8