Role of radiation in oligometastases and oligoprogression in metastatic non-small cell lung cancer: consensus and controversy.

Expert Rev Respir Med

Department of Radiation Oncology, Duke University, Durham, North Carolina, USA.

Published: December 2023

AI Article Synopsis

  • The oligometastatic state in non-small cell lung cancer (NSCLC) is a recognized but poorly defined condition, leading to ongoing research into metastasis-directed therapy (MDT) using radiation.
  • Several smaller randomized studies have indicated that radiation, particularly stereotactic body radiation therapy (SBRT), is both safe and effective for treating patients with oligometastatic NSCLC, paving the way for larger ongoing trials worldwide.
  • Despite uncertainties regarding the definition and timing of radiation therapy, it remains a critical component of treatment for oligometastatic NSCLC, especially as systemic therapies continue to advance.

Article Abstract

Introduction: The oligometastatic state in non-small cell lung cancer (NSCLC) has recently become well-established. However, the specific definition of oligometastases remains unclear. Several smaller randomized studies have investigated the safety and efficacy of radiation as metastasis-directed therapy (MDT) in oligometastatic NSCLC, which have led the way to larger studies currently accruing patients globally.

Areas Covered: This review covers the definitions of 'oligometastases' and explains why the oligometastatic state is becoming increasingly relevant in metastatic NSCLC. This includes the rationale for MDT in oligometastatic NSCLC, specifically reviewing stereotactic body radiation therapy (SBRT) as a treatment strategy. This review details many randomized trials that support radiation as MDT and introduces trials that are currently accruing patients. Finally, it explores some of the controversies that warrant further investigation.

Expert Opinion: Radiation treatment, specifically SBRT, has been shown to be safe, convenient, and cost-effective as MDT. As systemic therapy, including targeted agents and immunotherapy, continues to improve, the precise role(s) and timing of radiation therapy may evolve. However, radiation therapy as MDT will continue to be an integral part of treatment in patients with oligometastatic NSCLC.

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Source
http://dx.doi.org/10.1080/17476348.2023.2284362DOI Listing

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