IL-4/JAK/STAT6 pathway activation in follicle center lymphoma of the lower female genital tract: A case report

Follicle center lymphoma (FCL) of the lower female genital tract (LFGT) is a recently proposed subtype of B-cell lymphoma that resembles primary cutaneous follicle center lymphoma. Although targeted next-generation sequencing (NGS) studies have identified recurrent TNFRSF14 mutations in FCL of the L...

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Vydané v:	Human Pathology Reports Ročník 42; s. 300805
Hlavní autori:	Kitaoka, Takumi, Satou, Akira, Kitamura, Eiichi, Aizawa, Keiko, Sudo, Takeshi, Abe, Madoka, Kabasawa, Takanobu, Suzuki, Kazushi, Uchiyama, Naoya, Ohe, Rintaro
Médium:	Journal Article
Jazyk:	English
Vydavateľské údaje:	Elsevier Inc 01.11.2025 Elsevier
Predmet:	Follicle center lymphoma of the lower female genital tract IL4R Pathology SOCS3 TNFRSF14 Whole-exome sequencing SOCS3 TNFRSF14 IL4R Whole-exome sequencing Follicle center lymphoma of the lower female genital tract
ISSN:	2772-736X, 2772-736X
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Shrnutí:	Follicle center lymphoma (FCL) of the lower female genital tract (LFGT) is a recently proposed subtype of B-cell lymphoma that resembles primary cutaneous follicle center lymphoma. Although targeted next-generation sequencing (NGS) studies have identified recurrent TNFRSF14 mutations in FCL of the LFGT, its broader mutational landscape remains largely uncharacterized. We report a case of FCL of the LFGT in a woman in her 40s presenting with a cervical tumor. Histological examination revealed a predominantly diffuse proliferation of CD20+, CD79a+, BCL6+, HGAL+, CD23+, and BCL2− atypical lymphocytes, consistent with a centrocytic phenotype. Numerous T follicular helper cells were observed in the background of the lesion. Whole-exome sequencing identified 1,336 coding variants. After filtering based on tumor cell content and CADD phred score (≥20), 125 variants were retained, including a nonsense mutation in TNFRSF14 and missense mutations in IL4R and SOCS3. The TNFRSF14 mutation may contribute to the accumulation and activation of T follicular helper cells by disrupting the inhibitory HVEM–BTLA signaling pathway. In addition, IL4R and SOCS3 mutations may lead to upregulation of the IL-4/JAK/STAT6 pathway, promoting tumor cell survival and proliferation. These findings provide new insights into the molecular pathogenesis of FCL of the LFGT.
ISSN:	2772-736X 2772-736X
DOI:	10.1016/j.hpr.2025.300805