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Kashiwabara, Kosuke; Semba, Hiroshi; Fujii, Shinji; Tsumura, Shinsuke
Respiratory investigation, 11/2016, Volume: 54, Issue: 6Journal Article
Abstract Background Whether a full dosage of afatinib is tolerable and effective for elderly or low performance status (PS) patients with advanced refractory non-small-cell lung cancer (NSCLC) is unclear. Methods We retrospectively evaluated the tolerability and efficacy of afatinib in 10 patients (the majority elderly) with a low PS score (2 or 3), who had advanced refractory adenocarcinoma and were carrying active epidermal growth factor receptor mutations. Afatinib was administered at a starting dosage of 20 or 30 mg/day, followed by 10 mg increases in dose up to a maximum dosage of 40 mg/day. Results The median patient age was 76 years and 50% of the patients had a PS of 3. The patients had previously been treated with gefitinib and/or erlotinib, with a median number of three chemotherapy regimens. All the patients received at least 30 mg/day of afatinib. Eight patients did not receive the 40 mg/day dosage because of patient refusal due to grade 2 diarrhea ( n =6) or the judgment of the doctor ( n =2). One patient discontinued the treatment because of drug-induced interstitial lung disease. The most frequent adverse event was grade 2 diarrhea. The objective response rate was 11% and the PS score of five cases improved after afatinib therapy. The median progression-free survival and overall survival periods were 3.6 months and 5.8 months, respectively. Conclusions A low starting dosage of afatinib might enable elderly or low PS patients with advanced refractory NSCLC to receive this drug as salvage therapy.
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