scholarly journals Stereotactic body radiation therapy mitigates radiation induced lymphopenia in early stage non-small cell lung cancer

PLoS ONE ◽  
2020 ◽  
Vol 15 (11) ◽  
pp. e0241505
Author(s):  
Mark F. McLaughlin ◽  
Morshed Alam ◽  
Lynnette Smith ◽  
Jeffrey Ryckman ◽  
Chi Lin ◽  
...  
Keyword(s):  
Lung Cancer ◽  
Radiation Therapy ◽  
Small Cell Lung Cancer ◽  
Cell Lung Cancer ◽  
Stereotactic Body Radiation Therapy ◽  
Early Stage ◽  
Small Cell ◽  
Small Cell Lung ◽  
Early Stage Nsclc ◽  
Radiation Induced

Introduction Radiation-induced lymphopenia (RIL) occurs during treatment with conventional radiation in multiple organ sites. Development of RIL portends poor prognosis. Stereotactic body radiation therapy (SBRT) spares RIL in pancreatic cancer, but has not been examined in other sites commonly treated with SBRT. This work examines if SBRT similarly spares RIL in patients with non-small cell lung cancer (NSCLC). Materials and methods Retrospective analysis was done at a single institution on 40 distinct cases of SBRT for early stage NSCLC from 2006–2017. Incidentally collected lymphocyte counts collected within 6 months of SBRT treatment were analyzed to determine if RIL occurred. The presence of RIL was correlated with location of initial failure and survival endpoints. Kaplan-Meier curves were constructed with significance defined at the level p < 0.05. Results RIL was observed in 35% of the analyzed patients. Patterns of failure and survival data were comparable to prior SBRT literature. There was no observed association in two year local, nodal, or distant failure, progression free survival, or overall survival based on the presence of RIL. Discussion SBRT spares RIL in NSCLC compared to historical rates observed with conventionally fractionated radiation. As understanding of the role of the immune system in cancer control continues to evolve, the importance of RIL sparing techniques take on increasing importance. This study represents further analysis of RIL sparing in SBRT in an early stage NSCLC cohort without the confounding influence of chemotherapy.

scholarly journals Stereotactic Body Radiation Therapy Mitigates Radiation Induced Lymphopenia in Early Stage Non-Small Cell Lung Cancer

2020 ◽  
Author(s):  
Mark McLaughlin ◽  
Morshed Alam ◽  
Lynette Smith ◽  
Jeffrey Ryckman ◽  
Chi Lin ◽  
...  
Keyword(s):  
Lung Cancer ◽  
Radiation Therapy ◽  
Small Cell Lung Cancer ◽  
Cell Lung Cancer ◽  
Stereotactic Body Radiation Therapy ◽  
Early Stage ◽  
Small Cell ◽  
Small Cell Lung ◽  
Early Stage Nsclc ◽  
Radiation Induced

Abstract Background Radiation-induced lymphopenia (RIL) occurs during treatment with conventional radiation in multiple organ sites. Development of RIL portends poor prognosis. Stereotactic body radiation therapy (SBRT) spares RIL in pancreatic cancer, but has not been examined in other sites commonly treated with SBRT. This work examines if SBRT similarly spares RIL in patients with non-small cell lung cancer (NSCLC). Methods Retrospective analysis was done at a single institution on 40 distinct cases of SBRT for early stage NSCLC from 2006-2017. Incidentally collected lymphocyte counts collected within 6 months of SBRT treatment were analyzed to determine if RIL occurred. The presence of RIL was correlated with location of initial failure and survival endpoints. Kaplan-Meier curves were constructed with significance defined at the level p = 0.05. Results RIL was observed in 35% of the analyzed patients. Patterns of failure and survival data were comparable to prior SBRT literature. There was no observed association in two year local, nodal, or distant failure, progression free survival, or overall survival based on the presence of RIL. Conclusions SBRT spares RIL in NSCLC compared to historical rates observed with conventionally fractionated radiation. As understanding of the role of the immune system in cancer control continues to evolve, the importance of RIL sparing techniques take on increasing importance. This study represents the first analysis of RIL sparing in SBRT in an early stage NSCLC cohort without the confounding influence of chemotherapy.

scholarly journals Stereotactic Body Radiation Therapy Versus Nonradiotherapeutic Ablative Procedures (Laser/Cryoablation and Electrocautery) for Early-Stage Non–Small Cell Lung Cancer

2019 ◽  
Vol 17 (5) ◽  
pp. 450-458 ◽  
Author(s):  
Michael J. Baine ◽  
Richard Sleightholm ◽  
Beth K. Neilsen ◽  
David Oupický ◽  
Lynette M. Smith ◽  
...  
Keyword(s):  
Lung Cancer ◽  
Radiation Therapy ◽  
Small Cell Lung Cancer ◽  
Cell Lung Cancer ◽  
Stereotactic Body Radiation Therapy ◽  
Early Stage ◽  
Small Cell ◽  
Small Cell Lung ◽  
Early Stage Nsclc ◽  
Ablative Procedures

Background: Despite the fact that stereotactic body radiation therapy (SBRT) is the only recommended first-line therapy for inoperable early-stage non–small cell lung cancer (NSCLC), several thermal ablative procedures (TAPs; defined herein as laser/cryoablation and electrocautery) are available. Studies showing outcomes of these procedures and how they compare with SBRT are scarce. We sought to evaluate the comparative efficacy of SBRT versus TAPs using the National Cancer Database (NCDB). Methods: The NCDB was queried for patients with early-stage NSCLC who did not undergo surgical resection. Treatment-specific inclusion criteria were applied to select for patients receiving either TAPs or SBRT. Univariate logistic regression and Cox proportional hazards modeling were performed, and Kaplan-Meier curves were generated. Serial propensity matches were performed using a modified greedy 8→n matching 1:1 algorithm. Results: A total of 27,734 patients were analyzed; 26,725 underwent SBRT and 1,009 underwent TAPs. Patients who received SBRT were older and more likely to have clinical stage IB (vs IA) disease. Despite this, SBRT was associated with longer median overall survival (mOS; 37.7 vs 33.5 months; P=.001) and 1-, 2-, and 5-year OS rates compared with the TAPs cohort (86.7% vs 83.1%, 67.5% vs 62.7%, and 30.6% vs 26.9%, respectively; P=.001). Upon propensity matching, improved OS with SBRT remained, with a mOS of 40.4 versus 33.4 months and 1-, 2-, and 5-year OS rates of 89.0% versus 82.9%, 69.7% versus 62.7%, and 34.4% versus 26.4%, respectively (P=.003). Conclusions: Despite being associated with more higher-risk factors, SBRT was associated with higher OS compared with TAPs for treatment of nonoperative patients diagnosed with early-stage NSCLC. However, causation cannot be implied owing to the inherent limitations of large heterogeneous datasets such as the NCDB.

Sign in / Sign up

Export Citation Format

Share Document