Amaç: Metastatik kolon kanserinde (mKRK) regorafenib oral multitarget kinaz inhibitörü olarak tek ajan aktiviteye sahiptir. Regorafenib kullanımıyla ilişkili en önemli sorun ilaca bağlı yan etki gelişme sıklığının ve intolerans oranının yüksek olmasıdır. Çalışmamızda kendi hasta grubumuzda regorafenib etkinliğini ve ilaç toleransını değerlendirmeyi amaçladık. Gereç ve Yöntemler: Ege Üniversitesi Onkoloji Kliniğine 2010-2017 yılları arasında başvuran mKRK hastalarının verileri retrospektif olarak tarandı. Regorafenib kullanan hastalarda tedaviye başlangıç dozu, tedavi esnasında gelişen yan etkiler, doz azaltımı uygulanıp uygulanmadığı ve sağkalım süreleri kayıt altına alındı. Bulgular: Regorafenib kullanan toplam 38 hasta tanımlandı. Hastaların medyan yaş 56 (30-76) idi. Hastaların %47,3 de tedaviye düşük doz ile başlandığı görüldü. Başlangıçta veya takipte düşük doz regorafenib kullanan hastalar ile standart dozda tedavi alan grup arasında progresyonsuz sağkalım(PSK) ve toplam sağkalım (GSK) açısından farklılık izlenmedi (düşük doz: medyan PSK: 4,1 ve GSK 6,6 ay; standart doz: medyan PSK: 4.0 ay GSK: 5,9 ay). Hastaların %16 da regorafenib ilaç intoleransı nedeniyle kesildi.Primer tümör lokalizasyonu, primere yönelik cerrahi uygulanımı, ilk basamak tedavide PSK süresi, metastatik bölge sayısı ve kaçıncı basamakta regorafenibin kullanıldığı gözönüne alındığında herhangi bir subgrupta regorafenib ile daha iyi yanıt izlenmedi. Sonuç: mKRK hastalarımızda düşük doz regorafenib ile tedaviye başlanan hastalar ile standart doz tedavi alan hastalar arasında PSK ve GSK açısından farklılık izlenmedi.
Anahtar Kelimeler: Kolorektal kanser; regorafenib
Objective: Regorafenib is an oral multitarget kinase inhibitor that has single agent activity on metastatic colorectal cancer (mCRC). The main issue in regorafenib use is the higher frequency of adverse events and intolerance due to treatmentIn this study, we aimed to evaluate our patients' regorafenib use and drug tolerance. Materials and Methods: Medical records of mCRC patients who admitted to Ege University Medical Oncology unit between 2010 and 2017 were retrospectively reviewed. In patients who received regorafenib; the treatment initial dose, adverse events during treatment, dose reduction and survival analyses were recorded. Results: We identified 38 patients who had received regorafenib treatment. The median age was 56 (30-76). Forty-seven percent of the patients had started treatment with reduced dose. Patients who had dose reduction in the beginning of treatment or in follow-up period showed similar progression free survival (PFS) and overall survival (OS) when compared to patients who received standart dose (low dose: med PFS: 4.1 months, med OS 6.6 months; standart dose group med PFS: 4.0 months, med OS:5.9 months). The regorafenib treatment ceased in %16 of the patient group due to treatment intolerance. When the study group was analysed according to subgroups defining the primary tumor localization, excision of primary lesion, the PFS interval in prior treatment setting, metastatic site number and line of regorafenib use; neither subgroup was found to be associated with better response to regorafenib. Conclusion: The survival results were similar in patients who had standart treatment dose or who had dose reduction in initiation of treatment or folllow-up period.
Keywords: Colorectal cancer; regorafenib
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