Definition of Synchronous Oligometastatic Non-Small Cell Lung Cancer-A Consensus Report

Anne-Marie C. Dingemans*, Lizza E. L. Hendriks, Thierry Berghmans, Antonin Levy, Baktiar Hasan, Corinne Faivre-Finn, Matteo Giaj-Levra, Niccolo Giaj-Levra, Nicolas Girard, Laurent Greillier, Sylvie Lantuejoul, John Edwards, Mary O'Brien, Martin Reck, Egbert F. Smit, Paul Van Schil, Pieter E. Postmus, Sara Ramella, Yolande Lievens, Mina GagaNir Peled, Giorgio Scagliotti, Suresh Senan, Luiz Paz-Ares, Matthias Guckenberger, Fiona McDonald, Simon Ekman, Tanja Cufer, Hester Gietema, Maurizio Infante, Rafal Dziadziuszko, Solange Peters, Ramon Rami Porta, Johan Vansteenkiste, Christophe Dooms, Dirk de Ruysscher, Benjamin Besse, Silvia Novello

*Corresponding author for this work

Research output: Contribution to journalArticleAcademicpeer-review

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Introduction: Improved outcome has been shown in patients with synchronous oligometastatic (sOM) NSCLC when treated with radical intent. As a uniform definition of sOM NSCLC is lacking, we developed a definition and diagnostic criteria by a consensus process.

Methods: A pan-European multidisciplinary consensus group was established. Consensus questions were built on the basis of current controversies, and definitions were extracted from a survey, cases and a systematic review. This statement was formulated during a consensus meeting.

Results: It was determined that definition of sOM NSCLC is relevant when a radical treatment that may modify the disease course (leading to long-term disease control) is technically feasible for all tumor sites with acceptable toxicity. On the basis of the review, a maximum of five metastases and three organs was proposed. Mediastinal lymph node involvement was not counted as a metastatic site. Fludeoxyglucose F 18 positron emission tomography-computed tomography and brain imaging were considered mandatory. A dedicated liver magnetic resonance imaging scan was advised for a solitary liver metastasis, and thoracoscopy and biopsies of distant ipsilateral pleural sites were recommended for a solitary pleural metastasis. For mediastinal staging, fludeoxyglucose F 18 positron emission tomography-computed tomography was deemed the minimum requirement, with pathological confirmation recommended if this influences the treatment strategy. Biopsy of a solitary metastatic location was mandated unless the multidisciplinary team is of the opinion that the risks outweigh the benefits.

Conclusion: A multidisciplinary consensus statement on the definition and staging of sOM NSCLC has been formulated. This statement will help to standardize inclusion criteria in future clinical trials. (C) 2019 International Association for the Study of Lung Cancer. Published by Elsevier Inc. All rights reserved.

Original languageEnglish
Pages (from-to)2109-2119
Number of pages11
JournalJournal of Thoracic Oncology
Issue number12
Publication statusPublished - Dec 2019


  • Non-small cell lung cancer
  • Oligometastatic disease
  • Consensus definition
  • Staging


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