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MINI 15 - Chemotherapy Developments for Lung Cancer (ID 128)
- Event: WCLC 2015
- Type: Mini Oral
- Track: Treatment of Advanced Diseases - NSCLC
- Presentations: 1
MINI15.14 - The Role of Breath Sampling in Monitoring Response to Treatment in Lung Cancer (ID 2551)
16:45 - 18:15 | Author(s): R. Navon
The current available method to monitor response to treatment in lung cancer patient is by Computerized Tomography (CT) scans. However, time intervals between consecutive CT scans might be too long to allow early identification of treatment failure. The aim of this study is to examine the use of breath sampling as a tool for monitoring response to anti-cancerous treatment in patients with advanced lung cancer.
In a prospective study, repeated exhaled breath samples were collected from patients with advanced lung cancer before and under systemic therapy. VOCs profiles were determined by GC-MS and nanomaterial-based array of sensors and correlated with response to therapy, assessed by CT scans as Complete Response (CR), Partial Response (PR), Stable Disease (SD), or Progressive Disease (PD).  Volatile Organic Compounds  gas-chromatography/mass-spectrometry
One hundred forty three breath samples were collected from 39 patients with stage III/IV lung cancer. GC-MS anaylsis identified 3 VOCs as significantly indicating PR/SD samples. One of them was also significantly discriminated between PR/SD and PD. Further, the NA-NOSE signals were able to alarm per a change in tumor response across therapy, i.e. indicating lack of further response to therapy, or developement of resistance to therapy. PR/SD was detected in a sensitivity of 93%, specificity of 85% and accuracy of 89% and ppositive/negative predictive values (PPV; NPV) of 86% and 92% respectively. PD was detected with 100% specificity and 92% accuracy, but the sensitivity was only 28%. The PPV and NPV were 100% and 91%, respectively. The achieved results indicate high reliability in predicting a progression of the disease and detecting patient's lack of response to treatment (i.e., PD).
Breath analysis may serve as a serogate marker for response to systemic therapy in lung cancer. Such a monitoring tool can provide the oncologist with a quick and simple method to identify patient's response to anti-cancerous treatment in shorter intervals than currently available by CT scans.
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