PMID- 37188179 OWN - NLM STAT- PubMed-not-MEDLINE LR - 20230517 IS - 2234-943X (Print) IS - 2234-943X (Electronic) IS - 2234-943X (Linking) VI - 13 DP - 2023 TI - Case Report: Identification of a novel NTRK3-AJUBA fusion co-existing with ETV6-NTRK3 fusion in papillary thyroid carcinoma. PG - 1123812 LID - 10.3389/fonc.2023.1123812 [doi] LID - 1123812 AB - NTRK fusions are validated oncogenic drivers of various adult and pediatric tumor types, including thyroid cancer, and serve as a therapeutic target. Recently, tropomyosin receptor kinase (TRK) inhibitors, such as entrectinib and larotrectinib, display promising therapeutic efficacy in NTRK-positive solid tumors. Although some NTRK fusion partners have been identified in thyroid cancer, the spectrum of NTRK fusion is not fully characterized. In this study, a dual NTRK3 fusion was identified by targeted RNA-Seq in a 47-year-old female patient with papillary thyroid carcinoma. The patient harbors a novel in-frame fusion between NTRK3 exon 13 and AJUBA exon 2, co-existing with a known in-frame fusion between ETV6 exon 4 and NTRK3 exon 14. The dual NTRK3 fusion was validated by Sanger sequencing and fluorescence in situ hybridization (FISH) but lack TRK protein expression as defined by pan-TRK immunohistochemistry (IHC). We supposed the pan-TRK IHC result to be falsely negative. In conclusion, we present the first case of a novel NTRK3-AJUBA fusion co-existing with a known ETV6-NTRK3 fusion in thyroid cancer. These findings extend the spectrum of translocation partners in NTRK3 fusion, and the effect of dual NTRK3 fusion on TRK inhibitor therapy and prognosis needs long-term follow-up. CI - Copyright (c) 2023 Yu, Zhao, Wang, Zhang, Qin, Zhang and Han. FAU - Yu, Qing-Xiang AU - Yu QX AD - Key Laboratory of Digital Technology in Medical Diagnostics of Zhejiang Province, Dian Diagnostics Group Co., Ltd., Hangzhou, Zhejiang, China. FAU - Zhao, Wen-Jun AU - Zhao WJ AD - Department of Thyroid & Bariatric Metabolic Surgery, Shanxi Bethune Hospital, Shanxi Academy of Medical Sciences, Third Hospital of Shanxi Medical University, Taiyuan, Shanxi, China. FAU - Wang, He-Yue AU - Wang HY AD - Department of Thyroid & Bariatric Metabolic Surgery, Shanxi Bethune Hospital, Shanxi Academy of Medical Sciences, Third Hospital of Shanxi Medical University, Taiyuan, Shanxi, China. FAU - Zhang, Lei AU - Zhang L AD - Department of Thyroid & Bariatric Metabolic Surgery, Shanxi Bethune Hospital, Shanxi Academy of Medical Sciences, Third Hospital of Shanxi Medical University, Taiyuan, Shanxi, China. FAU - Qin, Lan AU - Qin L AD - Clinical Genome Center, Dian Diagnostics Group Co., Ltd., Hangzhou, Zhejiang, China. FAU - Zhang, Lei AU - Zhang L AD - Key Laboratory of Digital Technology in Medical Diagnostics of Zhejiang Province, Dian Diagnostics Group Co., Ltd., Hangzhou, Zhejiang, China. FAU - Han, Jian-Li AU - Han JL AD - Department of Thyroid & Bariatric Metabolic Surgery, Shanxi Bethune Hospital, Shanxi Academy of Medical Sciences, Third Hospital of Shanxi Medical University, Taiyuan, Shanxi, China. LA - eng PT - Case Reports DEP - 20230428 PL - Switzerland TA - Front Oncol JT - Frontiers in oncology JID - 101568867 PMC - PMC10176450 OTO - NOTNLM OT - ETV6-NTRK3 OT - NGS OT - NTRK3-AJUBA OT - fusion OT - papillary thyroid carcinoma COIS- Authors Q-xY, LQ, and LZ (6th author) were employed by Dian Diagnostics Group Co., Ltd. The remaining authors declare that the research was conducted in the absence of any commercial or financial relationships that could be construed as a potential conflict of interest. EDAT- 2023/05/16 01:09 MHDA- 2023/05/16 01:10 PMCR- 2023/01/01 CRDT- 2023/05/15 19:38 PHST- 2022/12/14 00:00 [received] PHST- 2023/04/07 00:00 [accepted] PHST- 2023/05/16 01:10 [medline] PHST- 2023/05/16 01:09 [pubmed] PHST- 2023/05/15 19:38 [entrez] PHST- 2023/01/01 00:00 [pmc-release] AID - 10.3389/fonc.2023.1123812 [doi] PST - epublish SO - Front Oncol. 2023 Apr 28;13:1123812. doi: 10.3389/fonc.2023.1123812. eCollection 2023.