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H. Kim



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    OA 08 - Neuroendocrine Carcinoma: Translational (ID 667)

    • Event: WCLC 2017
    • Type: Oral
    • Track: SCLC/Neuroendocrine Tumors
    • Presentations: 1
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      OA 08.07 - Pazopanib Maintenance for Extensive Disease Small Cell Lung Cancer: a Randomized, Placebo-Controlled Phase II study (KCSG-LU12-07) (ID 8239)

      12:05 - 12:15  |  Author(s): H. Kim

      • Abstract
      • Presentation
      • Slides

      Background:
      We investigated whether pazopanib maintenance following first-line chemotherapy would improve survival in patients with extensive disease small-cell lung cancer (ED-SCLD).

      Method:
      This study is a randomized, placebo-controlled, phase II study that enrolled ED-SCLC patients who had not progressed after four cycles of etoposide plus platinum combination therapy. Eligible patients were randomly assigned (1:1 ratio) to either placebo or pazopanib 800 mg per day until progression or unacceptable toxicity. The primary end point was progression-free survival (PFS).

      Result:
      Ninety-seven patients were enrolled and randomly assigned; 2 patients did not receive study drugs. In total, 95 patients received maintenance therapy (pazopanib, n = 48; placebo, n = 47) and were included into the analyses. Grade 3 toxicities for pazopanib maintenance included thrombocytopenia (10.4%, including 1 case with grade 4 toxicity), liver enzyme elevation (10.4%), fatigue (6.3%), and hypertension (6.3%). Median PFS was 3.7 months for pazopanib maintenance and 1.8 months for placebo (Hazard ratio [HR] 0.44, 95% CI: 0.29 – 0.69, p < 0.0001). Median PFS longer than 6 months were achieved by 9 patients (18.8%) in pazopanib arm and 2 (4.3%) in placebo. Median overall survival for the pazopanib and placebo arms were 10.6 months and 12.9 months, respectively (HR 1.14, 95% CI: 0.74 – 1.76, p = 0.54).

      Conclusion:
      Though this study met the primary endpoint of PFS, it failed to translate into improvement of overall survival with pazopanib maintenance. Given the unneglectable toxicity profiles, relevant biomarkers to select patients for benefit from pazopanib should be further investigated.

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