TURKISH JOURNAL OF ONCOLOGY 2017 , Vol 1 , Num 3
Lung Stereotactic Body Radiotherapy: Single-Center Experience
Melek AKÇAY1,Durmuş ETİZ1,Muzaffer METİNTAŞ2,Güntülü AK2,Alaattin ÖZEN1,Şenay YILMAZ2
1Department of Radiation Oncology, Eskişehir Osmangazi University Faculty of Medicine, Eskişehir-Turkey
2Department of Chest Diseases, Eskişehir Osmangazi University Faculty of Medicine, Eskişehir-Turkey
DOI : 10.5505/tjo.2020.2183 OBJECTIVE
To evaluate the results of stereotactic body radiotherapy (SBRT) in early-stage lung cancer, lung metastasis, and recurrent lung cancer.

METHODS
Fifty-nine cases that underwent lung SBRT due to early-stage lung cancer, lung metastasis, or lung cancer recurrence at our Radiation Oncology Department between 2016 and 2019 were retrospectively evaluated. The factors affecting overall survival (OS) and progression-free survival (PFS) after SBRT were investigated.

RESULTS
After SBRT, the median PFS was 12 (0-40) months, whereas OS was 16 (3-44) months. The median duration of OS and PFS were 15 (5-44) and 12.5 (3-40) months, respectively for early-stage lung cancer, 19 (3-28) and 12 (0-27) months, respectively for recurrent lung cancer, and 14 (5-25) and 8 (5-25) months, respectively, for lung metastasis. During the 16-month median follow-up after SBRT, eight cases (13.6%) died of cancer, and cancer progressed in 16 cases (27.1%). The factors affecting OS after SBRT were age (p=0.041), KPS (≥80) (p=0.019), and maximum tumor diameter (≤3 cm) (p=0.033) according to univariate analysis, and KPS (≥80) (p=0.011) and maximum tumor diameter (>3 cm) (p=0.007) according to multivariate analysis, and the variables affecting PFS after SBRT were GTV (p=0.011) and BED10 (≥100) (p=0.043) for the former, and GTV (p=0.011) for the latter. No patient developed ?3 radiation pneumonia.

CONCLUSION
Following lung SBRT, OS was better in younger patients, those with ≥80 KPS or with a tumor diameter of ≤3 cm while PFS was higher in cases with a small GTV volume and those that received BED10?100 radiotherapy dose. Keywords : Lung cancer; lung metastasis; stereotactic radiotherapy