Article (Scientific journals)
NTRK Fusions in a Sarcomas Series: Pathology, Molecular and Clinical Aspects.
Siozopoulou, Vasiliki; Marcq, Elly; De Winne, Koen et al.
2022In Pathology Oncology Research, 28, p. 1610423
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Keywords :
NTRK fusion; NTRK fusion partner; TRK immunohistochemistry; histology; prognosis; sarcoma; Biomarkers, Tumor; Receptor, trkA; Biomarkers, Tumor/analysis; Biomarkers, Tumor/genetics; Humans; Pathology, Molecular; Receptor, trkA/genetics; Sarcoma/genetics; Soft Tissue Neoplasms/genetics; Soft Tissue Neoplasms; Pathology and Forensic Medicine; Oncology; Cancer Research; General Medicine
Abstract :
[en] Targeting molecular alterations has been proven to be an inflecting point in tumor treatment. Especially in recent years, inhibitors that target the tyrosine receptor kinase show excellent response rates and durable effects in all kind of tumors that harbor fusions of one of the three neurotrophic tyrosine receptor kinase genes (NTRK1, NTRK2 and NTRK3). Today, the therapeutic options in most metastatic sarcomas are rather limited. Therefore, identifying which sarcoma types are more likely to harbor these targetable NTRK fusions is of paramount importance. At the moment, identification of these fusions is solely based on immunohistochemistry and confirmed by molecular techniques. However, a first attempt has been made to describe the histomorphology of NTRK-fusion positive sarcomas, in order to pinpoint which of these tumors are the best candidates for testing. In this study, we investigate the immunohistochemical expression of pan-TRK in 70 soft tissue and bone sarcomas. The pan-TRK positive cases were further investigated with molecular techniques for the presence of a NTRK fusion. Seven out of the 70 cases showed positivity for pan-TRK, whereas two of these seven cases presented an NTRK3 fusion. Further analysis of the fused sarcomas revealed some unique histological, molecular and clinical findings. The goal of this study is to expand the histomorphological spectrum of the NTRK-fused sarcomas, to identify their fusion partners and to correlate these parameters with the clinical outcome of the disease. In addition, we evaluated the immunohistochemical expression pattern of the pan-TRK and its correlation with the involved NTRK gene.
Disciplines :
Oncology
Author, co-author :
Siozopoulou, Vasiliki ;  Department of Pathology, Antwerp University Hospital, Edegem, Belgium ; Center for Oncological Research (CORE), Integrated Personalized and Precision Oncology Network (IPPON), University of Antwerp, Wilrijk, Belgium
Marcq, Elly;  Center for Oncological Research (CORE), Integrated Personalized and Precision Oncology Network (IPPON), University of Antwerp, Wilrijk, Belgium
De Winne, Koen;  Department of Pathology, Antwerp University Hospital, Edegem, Belgium
Norga, Koen;  Department of Pediatrics, Antwerp University Hospital, Edegem, Belgium
Schmitz, Gertjan;  Department of Orthopaedics, Hospital of Klina, Antwerp, Belgium
Duwel, Valerie;  Department of Pathology, Hospital of Klina, Antwerp, Belgium
Delvenne, Philippe ;  Centre Hospitalier Universitaire de Liège - CHU > > Service d'anatomie et cytologie pathologiques
Smits, Evelien;  Center for Oncological Research (CORE), Integrated Personalized and Precision Oncology Network (IPPON), University of Antwerp, Wilrijk, Belgium ; Center for Cell Therapy and Regenerative Medicine, Antwerp University Hospital, Edegem, Belgium
Pauwels, Patrick;  Department of Pathology, Antwerp University Hospital, Edegem, Belgium ; Center for Oncological Research (CORE), Integrated Personalized and Precision Oncology Network (IPPON), University of Antwerp, Wilrijk, Belgium
Language :
English
Title :
NTRK Fusions in a Sarcomas Series: Pathology, Molecular and Clinical Aspects.
Publication date :
2022
Journal title :
Pathology Oncology Research
ISSN :
1219-4956
Publisher :
Frontiers Media S.A., Switzerland
Volume :
28
Pages :
1610423
Peer reviewed :
Peer Reviewed verified by ORBi
Available on ORBi :
since 15 May 2023

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