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Nely Díaz-Mejía Vall d’Hebron Institute of Oncology (VHIO) and Vall d’Hebron University Hospital, Barcelona, Spain

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David García-Illescas Vall d’Hebron Institute of Oncology (VHIO) and Vall d’Hebron University Hospital, Barcelona, Spain

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Rafael Morales-Barrera Vall d’Hebron Institute of Oncology (VHIO) and Vall d’Hebron University Hospital, Barcelona, Spain

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Cristina Suarez Vall d’Hebron Institute of Oncology (VHIO) and Vall d’Hebron University Hospital, Barcelona, Spain

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Jacques Planas Vall d’Hebron Institute of Oncology (VHIO) and Vall d’Hebron University Hospital, Barcelona, Spain

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Xavier Maldonado Vall d’Hebron Institute of Oncology (VHIO) and Vall d’Hebron University Hospital, Barcelona, Spain

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Joan Carles Vall d’Hebron Institute of Oncology (VHIO) and Vall d’Hebron University Hospital, Barcelona, Spain

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Joaquin Mateo Vall d’Hebron Institute of Oncology (VHIO) and Vall d’Hebron University Hospital, Barcelona, Spain

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. 2020 b ). Moreover, a recent study comparing primary tumor biopsies and cfDNA samples acquired later at the time of mCRPC also confirmed that BRCA2, ATM and CDK12 defects are already present in the primary tumors of these patients ( Warner et al

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Darren Cowzer Department of Medicine, Memorial Sloan Kettering Cancer Center, New York, New York, USA

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Ronak H Shah Kravis Center for Molecular Oncology, Memorial Sloan Kettering Cancer Center, New York, New York, USA

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Joanne F Chou Department of Epidemiology and Biostatistics, Memorial Sloan Kettering Cancer Center, New York, New York, USA

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Ritika Kundra Kravis Center for Molecular Oncology, Memorial Sloan Kettering Cancer Center, New York, New York, USA

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Sippy Punn Department of Medicine, Memorial Sloan Kettering Cancer Center, New York, New York, USA

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Laura Fiedler Department of Medicine, Memorial Sloan Kettering Cancer Center, New York, New York, USA

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April DeMore Department of Medicine, Memorial Sloan Kettering Cancer Center, New York, New York, USA

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Marinela Capanu Department of Epidemiology and Biostatistics, Memorial Sloan Kettering Cancer Center, New York, New York, USA

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Michael F Berger Kravis Center for Molecular Oncology, Memorial Sloan Kettering Cancer Center, New York, New York, USA
Department of Pathology and laboratory medicine, Memorial Sloan Kettering Cancer Center, New York, New York, USA

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Diane Reidy-Lagunes Department of Medicine, Memorial Sloan Kettering Cancer Center, New York, New York, USA
Weill Medical College of Cornell University, New York, New York, USA

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Nitya Raj Department of Medicine, Memorial Sloan Kettering Cancer Center, New York, New York, USA
Weill Medical College of Cornell University, New York, New York, USA

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well-differentiated tumors, while RB1 loss is exclusive to poorly differentiated tumors, and altered TP53 is seen across the spectrum of NENs. Tumor-derived cell free DNA (cfDNA) detection in plasma provides the opportunity to potentially conduct

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Mark Daniel Masonic Cancer Center, University of Minnesota
Graduate Program in Microbiology, Immunology, and Cancer Biology, University of Minnesota, Minneapolis, Minnesota, USA

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Todd P Knutson University of Minnesota Supercomputing Institute, University of Minnesota, Minneapolis, Minnesota, USA

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Jamie M Sperger Department of Medicine, University of Wisconsin-Madison, Madison, Wisconsin, USA
Carbone Cancer Center, University of Wisconsin-Madison, Madison, Wisconsin, USA

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Yingming Li Masonic Cancer Center, University of Minnesota

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Anupama Singh Carbone Cancer Center, University of Wisconsin-Madison, Madison, Wisconsin, USA

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Charlotte N Stahlfeld Department of Medicine, University of Wisconsin-Madison, Madison, Wisconsin, USA
Carbone Cancer Center, University of Wisconsin-Madison, Madison, Wisconsin, USA

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Courtney Passow University of Minnesota Genomics Center, University of Minnesota, Minneapolis, Minnesota, USA

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Benjamin Auch University of Minnesota Genomics Center, University of Minnesota, Minneapolis, Minnesota, USA

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Joshua M Lang Department of Medicine, University of Wisconsin-Madison, Madison, Wisconsin, USA
Carbone Cancer Center, University of Wisconsin-Madison, Madison, Wisconsin, USA

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Scott M Dehm Masonic Cancer Center, University of Minnesota
Department of Laboratory Medicine and Pathology, University of Minnesota, Minneapolis, Minnesota, USA
Department of Urology, University of Minnesota, Minneapolis, Minnesota, USA

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tumors by identifying tumor-associated copy number alterations, mutations, and structural variants in plasma cell-free DNA (cfDNA). Targeted DNA-seq profiling of cfDNA and paired tissue biopsies in CRPC patients have shown that genomic alterations in

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Himisha Beltran Department of Medical Oncology, Dana Farber Cancer Institute, Harvard Medical School, Boston, Massachusetts, USA

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Francesca Demichelis Department of Cellular, Computational and Integrative Biology (CIBIO), University of Trento, Trento, Italy

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-invasive biomarkers have an additional advantage in more accurately reflecting composite tumor burden and molecular intra-patient heterogeneity. Especially in the setting of heterogeneous diseases such as metastatic prostate cancer, plasma cell-free DNA (cfDNA

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Walid Zeyghami Department of Otorhinolaryngology, Head and Neck Surgery and Audiology, University Hospital Rigshospitalet, University of Copenhagen, Copenhagen, Denmark

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Marie-Louise Uhre Hansen Department of Otorhinolaryngology, Head and Neck Surgery and Audiology, University Hospital Rigshospitalet, University of Copenhagen, Copenhagen, Denmark

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Kathrine Kronberg Jakobsen Department of Otorhinolaryngology, Head and Neck Surgery and Audiology, University Hospital Rigshospitalet, University of Copenhagen, Copenhagen, Denmark

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Christian Groenhøj Department of Otorhinolaryngology, Head and Neck Surgery and Audiology, University Hospital Rigshospitalet, University of Copenhagen, Copenhagen, Denmark

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Ulla Feldt-Rasmussen Department of Endocrinology, University Hospital Rigshospitalet, University of Copenhagen, Copenhagen, Denmark
Department of Clinical Medicine, Faculty of Health and Clinical Sciences, University of Copenhagen, Copenhagen, Denmark

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Christian von Buchwald Department of Otorhinolaryngology, Head and Neck Surgery and Audiology, University Hospital Rigshospitalet, University of Copenhagen, Copenhagen, Denmark
Department of Clinical Medicine, Faculty of Health and Clinical Sciences, University of Copenhagen, Copenhagen, Denmark

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Christoffer Holst Hahn Department of Otorhinolaryngology, Head and Neck Surgery and Audiology, University Hospital Rigshospitalet, University of Copenhagen, Copenhagen, Denmark

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released from the primary tumors such as circulating tumor cells (CTCs) or cell-free DNA (cfDNA) ( Fig. 1 ). Several techniques have been developed to detect liquid biopsies ( Palmirotta et al. 2018 , Lone et al. 2022 ). The increased release of cfDNA

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Laura Gerard Service de Gastroentérologie et d’Oncologie Médicale, Hospices Civils de Lyon, Hôpital Edouard Herriot, Lyon, France
Gastroenterology and Technologies for Health, Centre de Cancérologie de Lyon, INSERM U1052-CNRS UMR5286, Centre Léon Bérard, Lyon, France

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Céline Patte Gastroenterology and Technologies for Health, Centre de Cancérologie de Lyon, INSERM U1052-CNRS UMR5286, Centre Léon Bérard, Lyon, France

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Laurence Chardon Service de Biochimie Biologie Moléculaire, Centre de Biologie Est, Hospices Civils de Lyon, Bron, France

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Valérie Hervieu Gastroenterology and Technologies for Health, Centre de Cancérologie de Lyon, INSERM U1052-CNRS UMR5286, Centre Léon Bérard, Lyon, France
Service Central d’Anatomie et Cytologie Pathologiques, Hospices Civils de Lyon, Hôpital Edouard Herriot, Lyon, France

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Léa Payen Institut de Cancérologie des Hospices Civils de Lyon, CIRculating CANcer Program (CIRCAN), Lyon, France

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Marion Allio Gastroenterology and Technologies for Health, Centre de Cancérologie de Lyon, INSERM U1052-CNRS UMR5286, Centre Léon Bérard, Lyon, France

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Claire Marx Service d'Endocrinologie-Diabète-Nutrition, Hospices Civils de Lyon, Hôpital Lyon Sud, Lyon, France

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Hugo Clermidy Service de Chirurgie Thoracique, Vidéothoracoscopie et Transplantation Pulmonaire, Hospices Civils de Lyon, Hôpital Louis Pradel, Lyon, France

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Alice Durand Service de Gastroentérologie et d’Oncologie Médicale, Hospices Civils de Lyon, Hôpital Edouard Herriot, Lyon, France

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Patrick Mehlen Gastroenterology and Technologies for Health, Centre de Cancérologie de Lyon, INSERM U1052-CNRS UMR5286, Centre Léon Bérard, Lyon, France

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Julien Bollard Gastroenterology and Technologies for Health, Centre de Cancérologie de Lyon, INSERM U1052-CNRS UMR5286, Centre Léon Bérard, Lyon, France

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Gilles Poncet Service de Chirurgie Digestive, Hospices Civils de Lyon, Hôpital Edouard Herriot, Lyon, France

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Colette Roche Gastroenterology and Technologies for Health, Centre de Cancérologie de Lyon, INSERM U1052-CNRS UMR5286, Centre Léon Bérard, Lyon, France

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Benjamin Gibert Gastroenterology and Technologies for Health, Centre de Cancérologie de Lyon, INSERM U1052-CNRS UMR5286, Centre Léon Bérard, Lyon, France

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Thomas Walter Service de Gastroentérologie et d’Oncologie Médicale, Hospices Civils de Lyon, Hôpital Edouard Herriot, Lyon, France
Gastroenterology and Technologies for Health, Centre de Cancérologie de Lyon, INSERM U1052-CNRS UMR5286, Centre Léon Bérard, Lyon, France

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. 2021 ). In patients with cancer, the circulating tumour DNA (ctDNA) originates from tumour cells and represents a small fraction of circulating cell-free DNA (cfDNA). It can reflect the tumour mutational burden and is correlated with disease course in

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Conleth G Murphy Bons Secours Hospital Cork, Medical Oncology, Cork, Ireland
University College Cork, Medicine, Cork, Ireland

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Maura N Dickler Memorial Sloan-Kettering Cancer Center, Breast Medicine Service, New York, New York, USA
Joan and Sanford I Weill Medical College of Cornell University, Medicine, New York, New York, USA

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in BOLERO-2 was independent of PIK3CA mutational status as well as alterations of other closely related genes ( PTEN ) and pathways ( Hortobagyi et al. 2015 ). Subsequent analysis of cell-free DNA (cfDNA) extracted from archival plasma samples

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Marion T Weigel The Institute of Cancer Research, Royal Marsden Hospital, Breakthrough Breast Cancer Research Centre, 237 Fulham Road, London SW3 6JB, UK

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Mitch Dowsett The Institute of Cancer Research, Royal Marsden Hospital, Breakthrough Breast Cancer Research Centre, 237 Fulham Road, London SW3 6JB, UK
The Institute of Cancer Research, Royal Marsden Hospital, Breakthrough Breast Cancer Research Centre, 237 Fulham Road, London SW3 6JB, UK

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to meet the expectations is the identification of specific biomarkers on the CTCs, e.g. HER2 ( Fehm et al . 2005 ). Another possible approach to improve simplifying breast cancer management is the study of circulating cell-free DNA (cfDNA). This may

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Alexa Childs Department of Oncology, Royal Free London NHS Foundation Trust, London, UK

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Amy Kirkwood Cancer Research UK & UCL Cancer Trials Centre, London, UK

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Julien Edeline UCL Cancer Institute, UCL, London, UK

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Tu Vinh Luong Department of Pathology, Royal Free London NHS Foundation Trust, London, UK

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Jennifer Watkins Department of Pathology, Royal Free London NHS Foundation Trust, London, UK

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Angela Lamarca Institute of Cancer Sciences, University of Manchester/The Christie NHS Foundation Trust, Manchester, UK

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Doraid Alrifai King’s College Hospital NHS Foundation Trust, London, UK

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Phyllis Nsiah-Sarbeng Department of Radiology, Royal Free London NHS Foundation Trust, London, UK

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Roopinder Gillmore Department of Oncology, Royal Free London NHS Foundation Trust, London, UK

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Astrid Mayer Department of Oncology, Royal Free London NHS Foundation Trust, London, UK

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Christina Thirlwell Department of Oncology, Royal Free London NHS Foundation Trust, London, UK
UCL Cancer Institute, UCL, London, UK

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Debashis Sarker King’s College Hospital NHS Foundation Trust, London, UK

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Juan W Valle Institute of Cancer Sciences, University of Manchester/The Christie NHS Foundation Trust, Manchester, UK

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Tim Meyer Department of Oncology, Royal Free London NHS Foundation Trust, London, UK
UCL Cancer Institute, UCL, London, UK

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-specific multi-gene transcripts (NET-test) ( Modlin et al. 2014 ), cfDNA and CTCs ( Khan et al. 2016 ), but further work is required to prospectively validate these markers before they can be used to select patients for chemotherapy ( Modlin et al. 2014

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Enzo Lalli Université Côte d’Azur, Valbonne, France
CNRS UMR7275, Valbonne, France
NEOGENEX CNRS International Associated Laboratory, Valbonne, France
Institut de Pharmacologie Moléculaire et Cellulaire, Valbonne, France

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Michaela Luconi Department of Experimental and Clinical Biomedical Sciences ‘Mario Serio’, University of Florence, Florence, Italy

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exosome miR-483-5p importance in metastatic ACC. Circulating cell-free DNA (cfDNA) and cell-free tumor DNA (ctDNA) Finally, the liquid biopsy can also provide circulating cfDNA, derived from non-tumoral and tumoral cells (ctDNA). The exact

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