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- Title
Clinicopathologic Characteristics and A20 Mutation in Primary Thyroid Lymphoma.
- Authors
Yasuko Kuribayashi-Hamada; Mariko Ishibashi; Atsushi Tatsuguchi; Toshio Asayama; Namiko Takada-Okuyama; Asaka Onodera-Kondo; Keiichi Moriya; Takehito Igarashi; Hiroyuki Onose; Sakae Tanosaki; Norio Yokose; Hiroki Yamaguchi; Hideto Tamura
- Abstract
Background: Primary thyroid lymphoma (PTL) is a rare disease frequently arising against a background of autoimmune thyroiditis. It has recently been reported that the inactivation of the NF-κ B negative regulator A20 by deletion and/or mutation could be involved in the pathogenesis of subsets of B-cell lymphomas. This study investigated the clinicopathologic characteristics and A20 mutation in patients with PTL. Methods: We analyzed the characteristics of 45 PTL patients (14 men and 31 women), with a median age of 71 (range, 35-90) years. A20 mutations were analyzed in DNA extracted from 20 samples consisting of 19 tumor tissue samples and 1 sample from Hashimoto's thyroiditis. Results: Thirty-five patients (82%) had a history of Hashimoto's thyroiditis, and 29 (64%) had diffuse large B-cell lymphoma (DLBCL) and presented with larger tumors including bulky mass, elevated soluble interleukin-2 receptor levels, and a longer history of Hashimoto's thyroiditis than that of patients with mucosa-associated lymphoid tissue (MALT) lymphoma (n=16). A20 mutations were identified in 3 of 19 PTL patients (16%), in 2 of the 10 (20%) with DLBCL and in 1 of the 9 (11%) with MALT lymphoma. Interestingly, all patients with A20 mutations had Hashimoto's thyroiditis. Furthermore, they had a common missense variant in exon 3 (rs2230926 380T>G; F127C), which reduces the ability of A20 to inhibit NF-κ B signaling. Conclusion: Our study suggests that the histological features of PTL affect clinical outcomes and that A20 mutations are related to PTL pathogenesis in some patients with Hashimoto's thyroiditis.
- Subjects
DIFFUSE large B-cell lymphomas; AUTOIMMUNE thyroiditis; THYROIDITIS; LYMPHOMAS; MUCOSA-associated lymphoid tissue lymphoma; LYMPHOID tissue
- Publication
Journal of Nippon Medical School, 2022, Vol 89, Issue 3, p301
- ISSN
1345-4676
- Publication type
Article
- DOI
10.1272/jnms.JNMS.2022_89-305