Author of

• 13420

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  P1.01 - Poster Session/ Treatment of Advanced Diseases – NSCLC (ID 206)

  • Event: WCLC 2015
  • Type: Poster
  • Track: Treatment of Advanced Diseases - NSCLC
  • Presentations: 1
  • Moderators:
  • Coordinates: 9/07/2015, 09:30 - 17:00, Exhibit Hall (Hall B+C)

  • 13435

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    P1.01-015 - Clinical-Pathological and Survival Analysis of Patients with Advanced NSCLC and EGFR Mutation Treated With a Drug Therapy Anti-T790M (ID 2324)

    09:30 - 09:30  |  Author(s): L. Jiménez
    • Abstract

    Background:
    Multiple phase III trials have demonstrated the benefit in terms of RR and PFS of the EGFR TKIs versus platinum-based chemotherapy in patients with advanced NSCLC and EGFR mutation. Median PFS of these patients ranges from 9-13 months, time where a new therapy approach is needed, the most commonly chemotherapy nowadays. The main resistance mechanism described in this clinical situation is the development of T790M resistance mutation. There are no comparative efficacy data among chemotherapy and T790M targeted therapies. Our research included data from 15 patients treated in our Institution Phase I Unit with a T790M inhibitor analyzing the effectiveness according to their clinical features and mutational profile (T790M carriers or not)
    
    Methods:
    Descriptive clinico-pathological and efficacy analysis from October 2013 to March 2015 of patients with advanced NSCLC and EGFR mutation in progression and receiving T790M targeted therapy in the context of a phase I clinical trial performed in our Clinica Trial Unit.
    
    Results:
    Fifteen patients were included. The median age resulted 60 years (range 37-80 years) with a proportion of 8 (55%)/7 (45%) female/men. The entire study population was Caucasian and had an histological diagnosis of stage IV NSCLC with the presence of activating mutation of EGFR (66% L848R and del19 44%). In relation to smoking exposition, most of the patients were past-smokers (55%) or active (13%). All patients received a specific T790M inhibitor, 7 of them (45%) with a confirmed T790M mutation by local and/or local analysis. The average of prior lines of therapy before the experimental T790M inhibitor was 1,9. No grade 3/4 toxicities were reported. After an average follow up of 17 months, PFS of the overall population was 4,73 months, with a statistically significance difference between T790M positive patients (8,14 months) versus negative or unknown (1,8 months). We have no outcome at present of the OS for the active treatment of most the patients.
    
    Conclusion:
    Despite the limitation of the number of patients and follow-up time, our research suggested a clear survival benefit with the T790M inhibitor in the context of advanced NSCLC patients harboring T790M resistance mutation versus non in progression after EGFR TKI first line therapy.