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Born with two faces: sequential DLBCL, NOS and TFHL-AI with TET2 mutation - a case report
Qing Li1, Shishuo Dai1, Chenlu Yang1
1Department of Hematology and Institute of Hematology, West China Hospital, Sichuan University, Chengdu, Sichuan, China.
Frontiers in Immunology
|March 2, 2026
Summary
This case study reveals shared TET2 mutations in diffuse large B-cell lymphoma (DLBCL) and T follicular helper cell lymphoma (TFHL-AI), suggesting a common origin. TET2 mutations may drive lymphoma evolution, presenting diagnostic and therapeutic challenges.
Area of Science:
- Hematology
- Oncology
- Molecular Pathology
Background:
- Diffuse large B-cell lymphoma, not otherwise specified (DLBCL, NOS) and nodal T follicular helper cell lymphoma, angioimmunoblastic type (TFHL-AI) exhibit overlapping histopathological and pathogenetic features.
- The molecular mechanisms driving these similarities and potential sequential development of these lymphomas are not well understood.
Keywords:
TET2 mutationangioimmunoblastic typecase reportdiffuse large B-cell lymphomanext-generation sequencingnodal T follicular helper cell lymphomanot otherwise specified
