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. 2023 May;482(5):849-858.
doi: 10.1007/s00428-023-03493-x. Epub 2023 Jan 19.

Comparison of histological and molecular features of pediatric-type follicular lymphoma and pediatric nodal marginal zone lymphoma

Jiyeon Lee  1   2 , Jae-Ho Han  3 , Chang Hun Lee  4 , Ho-Sung Park  5 , Soo Kee Min  6 , Hojung Lee  7 , Uiju Cho  8 , Sang Eun Yoon  9 , Seok Jin Kim  9 , Won Seog Kim  9 , Junhun Cho  10
Affiliations

Comparison of histological and molecular features of pediatric-type follicular lymphoma and pediatric nodal marginal zone lymphoma

Jiyeon Lee et al. Virchows Arch. 2023 May.

Erratum in

Abstract

Pediatric-type follicular lymphoma and pediatric nodal marginal zone lymphoma are pediatric B cell lymphomas with similar clinical characteristics but distinct histological features. We investigated the differences between pediatric-type follicular lymphoma and pediatric nodal marginal zone lymphoma by comparing their histological and molecular characteristics. A total of 5 pediatric-type follicular lymphoma and 11 pediatric nodal marginal zone lymphoma patients were included in the study. In the histological review, 5 of the 16 cases showed overlapping morphological features of pediatric-type follicular lymphoma and pediatric nodal marginal zone lymphoma; hence, they were reclassified as "mixed type." In molecular analysis, using panel-based massively parallel sequencing, MAP2K1, TNFRSF14, and IRF8 mutations were found in 6, 3, and 2 of the 11 pediatric nodal marginal zone lymphoma patients, respectively, and IRF8 mutation was found in one of the five pediatric-type follicular lymphoma patients. There were no significant differences in genetic alterations established from the histologically reclassified diagnosis as well as the initial diagnosis. Pediatric-type follicular lymphoma and pediatric nodal marginal zone lymphoma showed morphological overlap in some cases, and no difference between the two was found upon molecular analysis. These findings suggest the possibility that pediatric-type follicular lymphoma and pediatric nodal marginal zone lymphoma are single entity pediatric B-cell lymphoma with broad morphological spectrum.

Keywords: Immunohistochemistry; Next-generation sequencing; Pediatric B-cell lymphoma; Pediatric nodal marginal zone lymphoma; Pediatric-type follicular lymphoma.

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