Repeat Thoracic Stereotactic Body Radiation Therapy (SBRT) for Nonsmall Cell Lung Cancer: Long-Term Outcomes, Toxicity, and Dosimetric Considerations.

Publication/Presentation Date

1-1-2020

Abstract

PURPOSE: Lung reirradiation for nonsmall cell lung cancer (NSCLC) is common for either recurrent disease or new primary cancer. Dose volume tolerance of the lung after multiple courses of radiation therapy (RT) is unknown. We review our experience with lung reirradiation for patients with NSCLC in a single community setting using stereotactic body radiation therapy (SBRT) to report lung cumulative doses, survival, and toxicity.

METHODS AND MATERIALS: Forty-four patients who received at least 2 curative courses of lung RT with the second course delivered between January 2012 and December 2017 were eligible. All patients had NSCLC and were treated with SBRT for reirradiation. Cumulative lung dose volume histograms for all courses were generated, summated, and converted into cumulative equivalent dose in 2 Gy fractions (EQD2). Actuarial overall survival (OS), local control, and toxicity is reported, including a subset of patients who received more than 2 courses of SBRT.

RESULTS: Median age of the group was 71 years (range, 51-87). Median survival of the entire group from diagnosis, first, and second courses of RT was 3.94, 3.03, and 2.03 years. Three-year actuarial OS for the entire group was 34.1% from second course of RT. The mean EQD2 Gy

CONCLUSIONS: Long-term OS is possible with multiple RT courses to the lung for NSCLC with low toxicity.

Volume

5

Issue

5

First Page

984

Last Page

993

ISSN

2452-1094

Disciplines

Medicine and Health Sciences

PubMedID

33083662

Department(s)

Department of Medicine, Department of Medicine Fellows and Residents, Fellows and Residents

Document Type

Article

Link to Full Text

Share

COinS