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M. Wakabayashi



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    MINI 37 - SCLC Therapy (ID 165)

    • Event: WCLC 2015
    • Type: Mini Oral
    • Track: Small Cell Lung Cancer
    • Presentations: 1
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      MINI37.06 - Randomized Phase II Trial of CODE or Amrubicin Plus Cisplatin Chemotherapy after Chemoradiotherapy for Limited-Disease Small Cell Lung Cancer (ID 1033)

      18:30 - 20:00  |  Author(s): M. Wakabayashi

      • Abstract
      • Presentation
      • Slides

      Background:
      Four cycles of etoposide plus cisplatin (EP) concurrently with accelerated hyperfractionation thoracic radiotherapy (AHTRT) is the standard treatment for limited-disease small cell lung cancer (LD-SCLC). The objectives of this study were to evaluate efficacy and toxicities of CODE or amrubicin plus cisplatin (AP) chemotherapy following one cycle of EP and AHTRT in patients with LD-SCLC, and to select the promising arm for subsequent phase III trials.

      Methods:
      Eligibility criteria included patients with previously untreated LD-SCLC with measurable lesion, ECOG PS of 0-1, and 20-70 years of age. Eligible patients received one cycle of EP (etoposide 100 mg/m[2] on days 1-3 and cisplatin 80mg/m[2] on day 1) plus AHTRT (45Gy/ 30 fractions in 3 weeks). Patients who achieved CR, PR or SD were secondarily registered and randomized to receive either 3 cycles of CODE (cisplatin 25 mg/m[2] on days 1 and 8, doxorubicin 40 mg/m[2] on day 1, etoposide 80 mg/m[2] on days 1-3, and vincristine 1 mg/m[2] on 8 every 2 weeks) or 3 cycles of AP (amrubicin 40 mg/m[2] on days 1-3 and cisplatin 60 mg/m[2] on day 1 every 3 weeks). G-CSF was administered on the days when chemotherapy was not administered in CODE, or on day 5 to the day when a neutrophil count exceeded 5,000/┬ÁL in AP. Patients with CR after CODE or AP received prophylactic cranial irradiation. The primary endpoint was the one-year progression-free survival (PFS) after the second registration. Tumor responses were assessed with RECIST version 1.1 by the central review committee. A better regimen for phase III trial is determined with a randomized phase II selection design. The sample size was 72 randomized patients to detect >= 10% difference in one-year PFS with a probability of 80%.

      Results:
      From May 2011 to Jan 2014, 85 patients from 28 institutions were registered. After the induction EP plus AHTRT, 75 patients were randomized to CODE (n=39) or AP (n=36). Patient demographics were well balanced between the arms. One patient did not receive CODE and 34 (89%) of the 38 patients received 3 cycles of CODE, whereas 33 (92%) of the 36 patients received 3 cycles of AP. Grade 4 neutropenia, anemia and thrombocytopenia were observed in 47%, 21% and 16% of patients in CODE, and in 78%, 6% and 17% of patients in AP, respectively. Grade 3 non-hematological toxicities with the incidence of 5% or higher included febrile neutropenia (16%), hyponatremia (8%), hypokalemia (5%), fatigue (5%), and anorexia (5%) in CODE, and febrile neutropenia (42%), nausea (11%), anorexia (11%), fatigue (8%), esophagitis (6%) in AP. CR and PR were noted in 13 and 25 patients in CODE, and in 10 and 24 patients in AP, respectively. The median overall survival in the 74 patients was 42.8 months. The one-year PFS (95% CI) was 41.0 (25.7 - 55.8) % in CODE and 54.3 (36.6 - 69.0) % in AP.

      Conclusion:
      The one-year PFS seemed better in AP than in CODE. AP arm is considered to be the test regimen for the subsequent phase III trial.

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