Publication date: 1 July 2018
Source:International Journal of Radiation Oncology*Biology*Physics, Volume 101, Issue 3
Author(s): Kiri A. Sandler, Fereidoun Abtin, Robert Suh, Ryan R. Cook, Carol Felix, Jay M. Lee, Edward B. Garon, Jeffrey Wu, Elaine M. Luterstein, Nzhde Agazaryan, Stephen E. Tenn, Chul Lee, Michael L. Steinberg, Percy Lee
PurposeStereotactic body radiation therapy (SBRT) and heat-based ablation (HBA) are both potentially safe and effective treatments for primary and metastatic lung tumors. Both are suboptimal for centrally located tumors, with SBRT having a higher risk of significant toxicity and HBA having lower efficacy. This study evaluates the safety and efficacy of combination SBRT-HBA to determine whether combined treatment can result in superior outcomes to each treatment alone.Methods and MaterialsPatients with 1 or 2 primary or metastatic lung tumors ≤ 5 cm in size were enrolled in a prospective phase 2 trial and treated with SBRT in 3 fractions followed by HBA. Tumors < 1 cm from the central bronchial tree received a total of 36 Gy, and tumors 1 to 2 cm away received 42 Gy. HBA was delivered within 10 days after SBRT. The primary endpoints were local control, toxicity, and degree of decline in lung function. The secondary endpoints were progression-free survival and overall survival.ResultsWe treated 16 patients with 17 tumors. The median follow-up time was 26 months. Fifteen tumors were evaluable for local control. The 1- and 2-year actuarial local control rates were 93% and 81%, respectively. Three patients had grade ≥ 3 toxicity: bronchial stenosis, pain, and pulmonary hemorrhage. The percent predicted forced expiratory volume in 1 second and functional vital capacity decreased by 8% and 8.5%, respectively, at 3 months after treatment (P < .001 for both).ConclusionsCombining SBRT and HBA for centrally located lung tumors offers reasonable local control and toxicity despite the anatomic challenges of this location. HBA may be a reasonable supplement to SBRT when trachea and bronchus, large vessel, or esophageal constraints cannot be met with full-dose SBRT and a biologically effective dose < 100 Gy is delivered because of an ultra-central location or large tumor size.
https://ift.tt/2Jg26us
Σφακιανάκης Αλέξανδρος
ΩτοΡινοΛαρυγγολόγος
Αναπαύσεως 5 Άγιος Νικόλαος
Κρήτη 72100
00302841026182
00306932607174
alsfakia@gmail.com
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Τετάρτη 30 Μαΐου 2018
A Prospective Phase 2 Study Evaluating Safety and Efficacy of Combining Stereotactic Body Radiation Therapy With Heat-based Ablation for Centrally Located Lung Tumors
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