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    Real-world data on efficacy and safety of first-line alectinib treatment in advanced-stage, ALK-positive non-small-cell lung cancer patients: A Turkish Oncology Group study
    (Future Medicine Ltd., 2022) Hızal, Mutlu; Bilgin, Burak; Paksoy, Nail; Kılıçkap, Sadettin; Atcı, Muhammed Mustafa; Kahraman, Seda; Keskinkılıç, Merve; Bilgetekin, İrem; Ayhan, Murat; Tural, Deniz; Eren, Önder; Akkoç Mustafayev, Fatma Nihan; Yaman, Şebnem; Tatlı, Ali Murat; Bayram, Ertuğrul; Kutlu, Yasin; Ertürk, İsmail; Özcan, Erkan; Gülmez, Ahmet; Korkmaz, Mustafa; Akagündüz, Baran; Erdem, Dilek; Akın Telli, Tuğba; Aksoy, Asude; Üskent, Necdet; İriağaç, Yakup; Köse Baytemür, Naziyet; Aydın, Dinçer; Sakalar, Teoman; Arak, Haci; Selçukbiricik, Fatih; Ergün, Yakup; Korkmaz, Taner; Ak, Naziye; Ünal, Çağlar; Akdeniz, Nadiye; Özgün, Mehmet Alpaslan; Öksüzoğlu, Berna; Yalçın, Bülent; Öztop, İlhan; Algın, Efnan; Sakin, Abdullah; Aydıner, Adnan; Yumuk, Perran Fulden; Şendur, Mehmet Ali Nahit
    Aims: In this multicenter study, the authors aimed to determine the real-life efficacy and safety of first-line alectinib. Materials & methods: This retrospective trial included advanced-stage, ALK-positive non-small-cell lung cancer patients who were treated with first-line alectinib in terms of ALK-tyrosine kinase inhibitors, regardless of previous chemotherapy. The co-primary end points were progression-free survival both for all patients and for the treatment-naive population. The secondary end points were overall response rate, overall survival, rate of CNS progression and safety. Results & conclusion: A total of 274 patients (n = 177 for treatment-naive patients) were enrolled in the study. The median progression-free survival was 26 and 28.8 months for all patients and the treatment-naive group, respectively. The overall response rate, CNS progression rate and 1-year overall survival ratio were 77.9, 12.4 and 77%. Alectinib is a highly effective therapy with a favorable safety profile.
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    The predictive importance of body mass index on response to neoadjuvant chemotherapy in patients with breast cancer
    (Karger, 2023) Emirzeoğlu, Levent; Arıcı, Serdar; Şahin, Ahmet Bilgehan; Ocak, Birol; Ak, Naziye; Ay, Seval; Mammadov, Elkhan; Turna, Hande; Bilici, Ahmet
    Purpose: The aim of the study was to investigate the effects of body mass index (BMI) on the response to neoadjuvant chemotherapy (NACT) in Turkish patients with local and locally advanced breast cancer. Methods: The pathological responses for the breast and axilla were assessed according to the Miller-Payne grading (MPG) system. Tumors were grouped into molecular phenotypes and classified as response rates according to the MPG system after the completion of NACT. A 90% or greater reduction in tumor cellularity was considered a good response to treatment. Additionally, patients were grouped according to BMI into <25 (group A) and ?25 (group B). Results: In total, 647 Turkish women with breast cancer were included in the study. In the univariate analysis, age, menopause status, tumor diameter, stage, histological grade, Ki-67, estrogen receptor (ER) status, progesterone receptor (PR) status, human epidermal growth factor receptor 2 (HER2) status, and BMI were assessed to determine which of these factors were associated with a ?90% response rate. Stage, HER2 positivity, triple-negative breast cancer (TNBC; ER-negative, PR-negative, and HER2-negative breast cancer), grade, Ki-67 levels, and BMI were found to be the statistically significant factors for a ?90% response rate. In the multivariate analysis, grade III disease, HER2 positivity, and TNBC were found to be the factors associated with a high pathological response. Meanwhile, hormone receptor (HR) positivity and a higher BMI were associated with a decreased pathological response in patients receiving NACT for breast cancer. Conclusion: Our results show that a high BMI and HR positivity are associated with a poor response to NACT in Turkish patients with breast cancer. The findings presented in this study may guide novel studies to examine the NACT response in obese patients with and without insulin resistance.
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    The real-life efficacy and safety of osimertinib in pretreated advanced non-small cell lung cancer patients with T790M mutation: A Turkish Oncology Group Study
    (Springer, 2022) Hızal, Mutlu; Bilgin, Burak; Paksoy, Nail; Açıkgöz, Özgür; Sezer, Ahmet; Gürbüz, Mustafa; Ak, Naziye; Yücel, Şebnem; Ayhan, Murat; Erol, Cihan; Demirkıran, Aykut; Mandel, Nil Molinas; Shbair, Abdallah; Gökmen, İvo; Başoğlu, Tuğba; Paydaş, Semra; Demiray, Atike Gökçen; İriağaç, Yakup; Şakalar, Teoman; Zeynelgil, Esra; Tatlı, Ali Murat; Bahçeci, Aykut; Güven, Deniz Can; Caner, Burcu; Can, Alper; Gülmez, Ahmet; Karakaş, Yusuf; Yalçın, Bülent; Demirkazık, Ahmet; Bilici, Ahmet; Aydıner, Adnan; Yumuk, Perran Fulden; Şendur, Mehmet Ali Nahit
    Introduction Osimertinib, an irreversible third-generation EGFR-TKI, is the standard of care for second-line treatment of T790M-mutant advanced NSCLC patients whose disease progressed after first-line EGFR-TKI therapy. In this multicenter study, we aimed to determine the real-life efficacy and safety of Osimertinib in pretreated advanced NSCLC patients with T790M mutation. Materials and methods This retrospective trial included advanced T790M-mutant pretreated NSCLC patients who received Osimertinib from 24 different centers in Turkey. Primary endpoint was time-to-treatment discontinuation (TTD). Secondary endpoints were objective response rate (ORR), overall survival (OS), and safety. Results Of 163 patients, 68.7% had EGFR exon 19 deletion and 22.7% had exon 21 L858R mutation. Osimertinib was given as second-line treatment in 96 patients (58.9%) and third-line in 48 patients (29.4%). After median of 13-month follow-up, median TTD was 21.6 months with an 82.2% ORR. Estimated median OS was 32.1 months. Grade 3-4 adverse events were seen in 11.7% of the patients. Conclusion Osimertinib is a highly effective option in second- or third-line treatment of NSCLC patients with T790M mutation, with a favorable safety profile.