Follicular helper T-cell lymphomas: disease spectrum, relationship with clonal hematopoiesis, and mimics. A report of the 2022 EA4HP/SH lymphoma workshop.

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State: Public
Version: Final published version
License: CC BY 4.0
Serval ID
serval:BIB_E68B1A31B1EE
Type
Article: article from journal or magazin.
Collection
Publications
Institution
Title
Follicular helper T-cell lymphomas: disease spectrum, relationship with clonal hematopoiesis, and mimics. A report of the 2022 EA4HP/SH lymphoma workshop.
Journal
Virchows Archiv
Author(s)
Ondrejka S.L., Amador C., Climent F., Ng S.B., Soma L., Zamo A., Dirnhofer S., Quintanilla-Martinez L., Wotherspoon A., Leoncini L., de Leval L.
ISSN
1432-2307 (Electronic)
ISSN-L
0945-6317
Publication state
Published
Issued date
09/2023
Peer-reviewed
Oui
Volume
483
Number
3
Pages
349-365
Language
english
Notes
Publication types: Journal Article ; Review
Publication Status: ppublish
Abstract
Follicular helper T-cell lymphomas (TFH lymphomas) were discussed in session V of the lymphoma workshop of the European Association for Haematopathology (EA4HP)/Society for Hematopathology (SH) 2022 meeting in Florence, Italy. The session focused on the morphologic spectrum of TFH lymphoma, including its three subtypes: angioimmunoblastic-type (AITL), follicular-type, and not otherwise specified (NOS). The submitted cases encompassed classic examples of TFH lymphoma and unusual cases such as those with early or indolent presentations, associated B-cell proliferations, or Hodgkin/Reed-Sternberg-like cells. The relationship between TFH lymphoma and clonal hematopoiesis was highlighted by several cases documenting divergent evolution of myeloid neoplasm and AITL from shared clonal mutations. The distinction between TFH lymphoma and peripheral T-cell lymphoma, not otherwise specified (PTCL, NOS), was stressed, and many challenging examples were presented. Various cases highlighted the difficulties of differentiating TFH lymphoma from other established types of lymphoma and reactive conditions. Cutaneous T-cell lymphoma expressing TFH markers, particularly when resulting in lymph node involvement, should be distinguished from TFH lymphomas. Additional immunophenotyping and next-generation sequencing studies were performed on various cases in this session, highlighting the importance of these technologies to our current understanding and classification of TFH lymphomas.
Keywords
Humans, Clonal Hematopoiesis, T-Lymphocytes, Helper-Inducer/pathology, Lymphoma, T-Cell, Peripheral/pathology, Lymph Nodes/pathology, Skin Neoplasms/pathology, Angioimmunoblastic T-cell lymphoma, Clonal hematopoiesis, EA4HP workshop, High-throughput sequencing, Peripheral T-cell lymphoma, T-cell lymphoma, TFH lymphoma
Pubmed
Web of science
Open Access
Yes
Create date
28/07/2023 15:52
Last modification date
04/10/2023 7:17
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