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S. Yamamoto



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    P3.07 - Poster Session/ Small Cell Lung Cancer (ID 223)

    • Event: WCLC 2015
    • Type: Poster
    • Track: Small Cell Lung Cancer
    • Presentations: 1
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      P3.07-005 - Maintenance Irinotecan Therapy in Extensive Disease Small Cell Lung Cancer: A Feasibility Study (ID 607)

      09:30 - 09:30  |  Author(s): S. Yamamoto

      • Abstract
      • Slides

      Background:
      We performed a feasibility study of maintenance irinotecan therapy in patients with extensive disease small cell lung cancer (ED-SCLC) who responded to the induction irinotecan plus cisplatin (IP) therapy.

      Methods:
      The eligibility criteria included pts with ED-SCLC who responded to four cycles of induction IP therapy, ECOG performance status (PS) of 0 to 1, age of 20 to 70 years and adequate organ functions. Pts received irinotecan monotherapy at 60 mg/m2 on days 1, 8 and 15 of a 28-day cycles until disease progression. The primary endpoint was the proportion of treatment success (TS) at 6 months. Using a binomial design, a lower activity level (p0) of 0.25 and a target activity level (p1) of 0.50, the preplanned accrual of 28 patients was sufficient (alpha, 0.10 and power, 0.90).

      Results:
      Between August 2012 and August 2013, 22 pts were enrolled. However, accrual was discontinued because of the three grade 3 pneumonitis events (3 of 22 patients, 13.6%). Patient characteristics of the 22 eligible pts were as follows; the median age was 65 (54-70) years; 12 pts had a PS of 0, and 16 pts were male. The median number of cycles delivered was four (range, 1–31). Four of 22 (18.2%) patients achieved TS at 6 months. Median progression free survival and overall survival from the start of the maintenance irinotecan therapy were 3.2 months and 15.9 months, respectively. Grade ≥3 toxicities included neutropenia (4.5%), hyponatremia (4.5%), pneumonitis (13.6%) and cholangitis (4.5%). No treatment-related deaths occurred. Figure 1



      Conclusion:
      This trial was early terminated due to the unexpected toxicity, but maintenance irinotecan therapy was still active for a subset of ED-SCLC.

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