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Öğe Biological Subtypes and Survival Outcomes in Breast Cancer Patients with Brain Metastases (Study of the Anatolian Society of Medical Oncology)(Karger, 2012) Kaplan, Muhammet Ali; Isikdogan, Abdurrahman; Koca, Dogan; Kucukoner, Mehmet; Gumusay, Ozge; Yildiz, Ramazan; Dayan, AdemBackground: The aim of this study is to determine the relationship between the survival outcomes and biological subtype in breast cancer patients with brain metastases. Methods: We retrospectively evaluated clinical data from 422 breast cancer patients with brain metastases between 2001 and 2011 from referral centers in Turkey. The study population was divided into four biological subtypes according to their hormone receptor status and HER2 expression. Results: Systemic treatment prolonged median overall survival (OS) after brain metastases in the entire group (14 vs. 3.2 months, p < 0.001). It also prolonged median OS after brain metastases in the triple negative (7.5 vs. 1.6 months, p = 0.010) and luminal A (14.3 vs. 7.1 months, p = 0.003) subgroups. The median OS for untreated patients, chemotherapy and/or hormonal therapy receiving patients, and chemotherapy and/or hormonal therapy plus targeted therapy receivers was 2, 5.8, and 17.7 months, respectively (p < 0.001), in the HER2-overexpressing subgroup. In the luminal B subgroup, it was 3.7, 5.3, and 15.4 months, respectively (p = 0.003). Conclusions: The use of systemic therapy improves OS after brain metastases in all biological subgroups. Targeted therapies also improve OS after brain metastases in HER2-positive patients. The combined use of targeted therapies and lapatinib are superior to single use and trastuzumab, respectively, in these patients. Copyright (C) 2012 S. Karger AG, BaselÖğe Clinical outcomes in patients who received lapatinib plus capecitabine combination therapy for HER2-positive breast cancer with brain metastasis and a comparison of survival with those who received trastuzumab-based therapy: a study by the Anatolian Society of Medical Oncology(Springer Japan Kk, 2014) Kaplan, Muhammet Ali; Isikdogan, Abdurrahman; Koca, Dogan; Kucukoner, Mehmet; Gumusay, Ozge; Yildiz, Ramazan; Dayan, AdemIn this study, we investigated the effect of lapatinib plus capecitabine treatment in HER2-positive breast cancer patients with brain metastasis. Of 405 metastatic breast cancer patients with brain metastases at referral centers in Turkey, 46 were treated with lapatinib plus capecitabine only after the development of brain metastasis. Patients who only received trastuzumab-based therapy after the development of brain metastases were accepted as the historic control group for survival analyses (n = 65). Patients who received both drugs consecutively or sequentially were excluded from the analyses (n = 34). Median age among 46 patients who received lapatinib plus capecitabine therapy was 45 years (27-76), and median time for development of brain metastases was 11.9 months (0-69 months). Twenty-six out of 38 patients who received lapatinib plus capecitabine and had extracranial metastasis showed partial response or stable diseases (68.4 %). Grade 3-4 toxicity was observed in eight patients (17.3 %). Median overall survival (OS) in patients treated with lapatinib plus capecitabine was significantly increased compared to that in patients treated with trastuzumab-based therapy (19.1 vs. 12 months, respectively, p = 0.039). The incidence of cerebral death was slightly decreased in patients who received lapatinib plus capecitabine compared to those who received trastuzumab-based therapy (32 vs. 43.4 %, p = 0.332). In the multivariate analysis, lapatinib plus capecitabine therapy remained an independent positive predictor for survival [odds ratio (OR), 0.57; p = 0.02]. Although this retrospective multicenter study had several limitations, the results suggest that undergoing lapatinib plus capecitabine therapy after the diagnosis of brain metastasis may further improve survival compared to undergoing only trastuzumab-based therapy.Öğe The efficacy and safety of first-line and salvage therapies with bevacizumab combination chemotherapy regimens in metastatic colorectal cancer: A retrospective ASMO experience.(Lippincott Williams & Wilkins, 2013) Yildiz, Ramazan; Buyukberber, Suleyman; Koca, Dogan; Korai, Lokman; Ciltas, Aydin; Unal, Olcun Umit; Gumus, Mahmut[Abstract Not Available]Öğe Efficacy of sorafenib in patients with gastrointestinal stromal tumors in the third- or fourth-line treatment: A retrospective multicenter experience(Spandidos Publ Ltd, 2013) Kefeli, Umut; Benekli, Mustafa; Sevinc, Alper; Yildiz, Ramazan; Kaplan, Muhammed Ali; Ciltas, Aydin; Balakan, OzanSorafenib is a multi-targeted tyrosine kinase receptor inhibitor used to treat patients with advanced gastrointestinal stromal tumors (GISTs). The present study evaluated the efficacy and tolerability of sorafenib therapy for patients with GISTs. Between January 2001 and November 2012, 25 patients, from multiple centers, who had received sorafenib as the third-or fourth-line treatment for GISTs were investigated retrospectively. In total, 17 patients were male and eight were female. The median age was 54.0 years (range, 16-82 years). From the patients, 21 received imatinib for longer than six months and four received it for less than six months. The clinical benefit rate of sorafenib was 40.0%. Treatment-related adverse events were reported in 72% of patients. These adverse events were generally mild to moderate in intensity. The median progression-free survival (PFS) and overall survival (OS) times of the patients who received sorafenib were 7.2 and 15.2 months, respectively. The duration of imatinib usage was an independent prognostic factor for PFS and OS. Sorafenib is an effective treatment in patients with GISTs showing a clinical benefit rate of 40.0% and an acceptable tolerability.Öğe Lapatinib or trastuzumab? Which anti-HER2 treatment is more effective in the treatment of patients with HER2-positive breast cancer with brain metastases? An Anatolian Society of Medical Oncology Study(Amer Soc Clinical Oncology, 2012) Kaplan, Muhammet Ali; Isikdogan, Abdurrahman; Koca, Dogan; Kucukoner, Mehmet; Gumusay, Ozge; Yildiz, Ramazan; Oztop, Ilhan[Abstract Not Available]
