PMID- 35681640 OWN - NLM STAT- PubMed-not-MEDLINE LR - 20221126 IS - 2072-6694 (Print) IS - 2072-6694 (Electronic) IS - 2072-6694 (Linking) VI - 14 IP - 11 DP - 2022 May 27 TI - Tropomyosin-Related Kinase Fusions in Gastrointestinal Stromal Tumors. LID - 10.3390/cancers14112659 [doi] LID - 2659 AB - The canonical mutations in gastrointestinal stromal tumors (GISTs) are typically activating mutations in KIT and platelet-derived growth factor receptor alpha (PDGFRA). GISTs with non-canonical mutations are a heterogeneous group. Here, we examined tropomyosin-related kinase (TRK) fusion in GIST cases without KIT/PDGFRA mutations (KIT/PDGFRA wild-type (WT) GISTs). We retrospectively analyzed patients who were diagnosed with GISTs at the Yonsei Cancer Center, Severance Hospital, between January 1998 and December 2016. Thirty-one patients with KIT/PDGFRA WT GISTs were included in the analysis. TRK expression in tumor samples was assessed by pan-TRK immunohistochemistry (IHC), and the neurotrophic tyrosine receptor kinase (NTRK: the gene encoding TRK) rearrangement was analyzed by fluorescence in situ hybridization (FISH). IHC analyses revealed that five cases in this cohort exhibited a weak to moderate TRK expression. NTRK1 fusions were detected in three tumor samples, and two samples harbored NTRK3 fusions. The remaining 26 samples did not harbor NTRK fusions. Two types of NTRK fusions were detected, and the overall NTRK fusion frequency in KIT/PDGFRA WT GIST cases was 16% (5/31). Our data provide insights into the molecular alterations underpinning KIT/PDGFRA WT GISTs. More effort should be devoted to improve methods to identify this distinct disease subtype within the KIT/PDGFRA WT GIST group. FAU - Lee, Ji Hyun AU - Lee JH AD - Department of Internal Medicine, Division of Medical Oncology, Eunpyeong St. Mary's Hospital, The Catholic University of Korea, Seoul 03312, Korea. FAU - Shin, Su-Jin AU - Shin SJ AUID- ORCID: 0000-0001-9114-8438 AD - Department of Pathology, Gangnam Severance Hospital, Yonsei University College of Medicine, Seoul 06273, Korea. FAU - Choe, Eun-Ah AU - Choe EA AD - Department of Internal Medicine, Division of Hospital Medicine, Yonsei University College of Medicine, Seoul 03722, Korea. FAU - Kim, Jungyoun AU - Kim J AD - Department of Medicine, Yonsei University College of Medicine, Seoul 03722, Korea. AD - Songdang Institute for Cancer Research, Yonsei University College of Medicine, Seoul 03722, Korea. FAU - Hyung, Woo Jin AU - Hyung WJ AUID- ORCID: 0000-0002-8593-9214 AD - Department of Surgery, Yonsei University College of Medicine, Seoul 03722, Korea. FAU - Kim, Hyo Song AU - Kim HS AD - Yonsei Cancer Center, Department of Internal Medicine, Division of Medical Oncology, Yonsei University College of Medicine, Seoul 03722, Korea. FAU - Jung, Minkyu AU - Jung M AD - Yonsei Cancer Center, Department of Internal Medicine, Division of Medical Oncology, Yonsei University College of Medicine, Seoul 03722, Korea. FAU - Beom, Seung-Hoon AU - Beom SH AD - Yonsei Cancer Center, Department of Internal Medicine, Division of Medical Oncology, Yonsei University College of Medicine, Seoul 03722, Korea. FAU - Kim, Tae Il AU - Kim TI AUID- ORCID: 0000-0003-4807-890X AD - Department of Internal Medicine, Institute of Gastroenterology, Yonsei University College of Medicine, Seoul 03722, Korea. FAU - Ahn, Joong Bae AU - Ahn JB AD - Yonsei Cancer Center, Department of Internal Medicine, Division of Medical Oncology, Yonsei University College of Medicine, Seoul 03722, Korea. FAU - Chung, Hyun Cheol AU - Chung HC AD - Yonsei Cancer Center, Department of Internal Medicine, Division of Medical Oncology, Yonsei University College of Medicine, Seoul 03722, Korea. FAU - Shin, Sang Joon AU - Shin SJ AD - Yonsei Cancer Center, Department of Internal Medicine, Division of Medical Oncology, Yonsei University College of Medicine, Seoul 03722, Korea. LA - eng PT - Journal Article DEP - 20220527 PL - Switzerland TA - Cancers (Basel) JT - Cancers JID - 101526829 EIN - Cancers (Basel). 2022 Nov 17;14(22):. PMID: 36428814 PMC - PMC9179593 OTO - NOTNLM OT - KIT OT - PDGF receptor tyrosine kinase OT - gastrointestinal stromal tumor OT - neurotrophic tyrosine receptor kinase fusion OT - tropomyosin-related kinase fusion COIS- The authors declare no conflict of interest. EDAT- 2022/06/11 06:00 MHDA- 2022/06/11 06:01 PMCR- 2022/05/27 CRDT- 2022/06/10 01:08 PHST- 2022/03/24 00:00 [received] PHST- 2022/05/23 00:00 [revised] PHST- 2022/05/24 00:00 [accepted] PHST- 2022/06/10 01:08 [entrez] PHST- 2022/06/11 06:00 [pubmed] PHST- 2022/06/11 06:01 [medline] PHST- 2022/05/27 00:00 [pmc-release] AID - cancers14112659 [pii] AID - cancers-14-02659 [pii] AID - 10.3390/cancers14112659 [doi] PST - epublish SO - Cancers (Basel). 2022 May 27;14(11):2659. doi: 10.3390/cancers14112659.