Abstract
The prognosis for patients with extensive-stage small-cell lung cancer remains poor. This trial was designed to evaluate irinotecan/cisplatin plus maintenance imatinib in patients with c-Kit-positive disease (the transmembrane receptor c-Kit is the product of the c-KIT protooncogene). Immunohistochemistry for c-Kit was performed before enrollment. Treatment consisted of irinotecan 65 mg/m2 on days 1 and 8 plus cisplatin 60 mg/m2 on day 1 and every 21 days for 4 cycles. Imatinib was administered at 400 mg twice a day until progression or unacceptable toxicity occurred. Fourteen patients were enrolled. Slow accrual led to early study termination. Six patients did not begin treatment with imatinib because of disease progression, persistent toxicity, or referral for radiation therapy. Eight patients had a partial response with irinotecan/cisplatin and received imatinib. The median number of weeks on imatinib was 6.1 (range, 4.1-25.1 weeks). Reasons for imatinib discontinuation included disease progression (n = 7) and persistent neutropenia (n = 1). No objective responses to imatinib were evident, but 3 patients (21%) exhibited stable disease for 12, 15, and 25 weeks. The median progression-free survival was 4.3 months (95% CI, 2.9-...Continue Reading
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