Stereotactic Body Radiation Therapy (SBRT): An optimal approach in the treatment of lung cancer and pulmonary metastases – a Portuguese center experience
DOI:
https://doi.org/10.32932/gecp.2023.10.036Keywords:
Radiotherapy, SBRT, Lung cancer, Lung metastasesAbstract
Stereotactic Body Radiation Therapy (SBRT) is a noninvasive, safe, and effective treatment for early-stage lung cancer and metastatic lung disease in selected patients. Although there is no current consensus on the ideal dose and fractionation schedule for pulmonary SBRT, intensive regimens of BED ≥100 Gy are associated with significantly better local control and survival.The purpose of this study was to analyze fractionation schedules, toxicity and survival outcomes in patients with early-stage lung cancer and lung metastases treated with SBRT between January 2016 – December 2021 in our center. Toxicity was evaluated using CTCAE v5.0 and survival outcomes by the Kaplan–Meier method. We included 90 patients (110 tumors total) with a median age of 71 years and Karnofsky Performance Status≥90% in 74,4%. 42 patients (43 tumors) had early-stage primary lung cancer, mostly adenocarcinoma (76,2%), stage cT1b-cN0 (66,7%) and peripheral tumors (83,7%) with a median size of 20,5mm (8-50). 48 patients (67 tumors) had secondary lung disease mostly from colorectal cancer (66,7%), 70,1% were peripheral tumors with a median size of 11,5 mm (4-43 mm). Regarding toxicity, 8,9% of patients had pneumonitis (grade 1 and 2), 11,1% reported chest pain and 5,6% had rib fracture (grade 1). Median follow up was 22 months. In primary lung cancer, the 2-year tumor control (TC), overall survival (OS) and disease free survival (DFS) was 84,6%, 71,6% and 51,4%, respectively. Patients with lung metastases had a 2-year TC of 86,8%%, OS of 74% and DFS of 34,4%. SBRT is a well tolerated treatment option with favorable outcomes.Downloads
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