Browsing by Author "Goker E."

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    Potential predictive factors for response to weekly paclitaxel treatment in patients with metastatic breast cancer
    (E.S.I.F.T. srl, 2005) Sezgin C.; Karabulut B.; Uslu R.; Sanli U.A.; Goksel G.; Zekioglu O.; Ozdemir N.; Goker E.
    The authors compare results obtained from weekly paclitaxel treatment in advanced breast cancer patients with biological and clinical prognostic factors. Expression of c-erbB-2, Ki-67, p53 and hormone receptors (HR) was examined by immunohistochemistry in samples of breast tissue from 30 patients. Univariate analysis showed that Ki-67 positivity and low performance status (PS) were associated with poor outcome (P <0.05). We observed that expression of p53 and c-erbB-2 did not have any negative effect on response to chemotherapy and survival. HR-negative patients had better response and slightly statistically significant overall survival (OS) rates compared to HR-positive patients (P >0.05). In a multivariate analysis low PS was the only significant predictor of shorter survival (P <0.05). In conclusion, while the expression of p53 and c-erbB-2 did not have any effect on treatment results, negative Ki-67 expression and negative HR status were associated with better OS in this patient population. PS was the only significant predictor for OS. © E.S.I.F.T. srl - Firenze.
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    Gemcitabine treatment in patients with inoperable locally advanced/metastatic pancreatic cancer and prognostic factors
    (2005) Sezgin C.; Karabulut B.; Uslu R.; Sanli U.A.; Goksel G.; Yuzer Y.; Goker E.
    Objective. Most patients with pancreatic cancer show an inoperable locally advanced/ metastatic tumour at the time of diagnosis. The present study was aimed at determining the prognostic factors in patients with advanced pancreatic carcinoma treated with gemcitabine. Material and methods. Sixty-seven unresectable or metastatic pancreatic cancer patients treated with gemcitabine were included in the study and a total of 258 cycles of treatment were applied. Results. The overall response rate was 5%. Thirty-one percent of the patients had stable disease, whereas progressive disease was seen in 49%. Clinical benefit response rate was 15%. The median duration of response was 7.3 months. Median progression-free survival was 3 months, while median overall survival was 9 months. Univariate analysis revealed that worse results were found in patients with performance status (PS) =2, and in patients with primary tumour location in the body or tail of the pancreas (p <0.05). Multivariate analysis of data revealed that the most important factor was PS of the patient, as the patients with PS =2 had worse results than the patients with PS =0-1 (p <0.05). Conclusions. Low PS is a negative predictive factor for the survival of patients with advanced pancreatic carcinoma treated with gemcitabine. © 2005 Taylor & Francis.
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    Real-life comparison of afatinib and erlotinib in non-small cell lung cancer with rare EGFR exon 18 and exon 20 mutations: a Turkish Oncology Group (TOG) study
    (Springer Science and Business Media Deutschland GmbH, 2023) Gursoy P.; Tatli A.M.; Erdem D.; Goker E.; Celik E.; Demirci N.S.; Sakin A.; Atci M.M.; Bayram E.; Telli T.A.; Bilgin B.; Bilici A.; Akangunduz B.; Balli S.; Demirkazik A.; Selçukbiricik F.; Menekse S.; Cavdar E.; Ozturk A.; Bekmez E.T.; Turhal S.; Kilickap S.; Yildirim H.Ç.; Oyan B.; Aksoy A.; Turkoz F.P.; Kut E.; Katgi N.; Sakalar T.; Akyol M.; Ellez H.İ.; Topcu A.; Erdoğan A.P.; Pilanci K.N.; Hedem E.; Arak H.; Akdeniz N.; Alan Ö.; Yapar B.; Nart D.; Yumuk P.F.
    Objectives: To compare the survival of first- and second-generation tyrosine kinase inhibitors (TKIs) in patients with rare EGFR exon 18 and exon 20 mutation-positive non-small cell lung cancer (NSCLC). Materials and methods: We retrospectively evaluated survival characteristics of 125 patients with EGFR exon 18 and exon 20 mutated NSCLC who received erlotinib or afatinib as first line treatment between 2012 and 2021 from 34 oncology centres. Since exon 20 insertion is associated with TKI resistance, these 18 patients were excluded from the study. Results: EGFR exon 18 mutations were seen in 60%, exon 20 mutations in 16%, and complex mutations in 24% of the patients with NSCLC who were evaluated for the study. There were 75 patients in erlotinib treated arm and 50 patients in afatinib arm. Patients treated with erlotinib had progression-free survival time (PFS) of 8.0 months and PFS was 7.0 months in the afatinib arm (p = 0.869), while overall survival time (OS) was 20.0 vs 24.8 months, respectively (p = 0.190). PFS of exon 18 mutated arm was 7.0 months, exon 20 mutated arm was 4.3 months, and complex mutation positive group was 17.3 months, and this was statistically significant (p = 0.036). The longest OS was 32.5 months, seen in the complex mutations group, which was not statistically different than exon 18 and in exon 20 mutated groups (21.0 and 21.2 months, respectively) (p = 0.323). Conclusion: In this patient group, especially patients with complex mutations are as sensitive to EGFR TKI treatment similar to classical mutations, and in patients with rare exon 18 and exon 20 EGFR mutation both first- and second-generation EGFR-TKIs should be considered, especially as first- and second-line options. © 2022, The Author(s), under exclusive licence to Springer-Verlag GmbH Germany, part of Springer Nature.
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    Regorafenib Treatment for Recurrent Glioblastoma Beyond Bevacizumab-Based Therapy: A Large, Multicenter, Real-Life Study
    (Multidisciplinary Digital Publishing Institute (MDPI), 2025) Tünbekici S.; Yuksel H.C.; Acar C.; Sahin G.; Orman S.; Majidova N.; Coskun A.; Seyyar M.; Dilek M.S.; Kara M.; Dıslı A.K.; Demir T.; Kolkıran N.; Sahbazlar M.; Demırcıler E.; Kuş F.; Aytac A.; Menekse S.; Yucel H.; Biter S.; Koseci T.; Unsal A.; Ozveren A.; Sevınc A.; Goker E.; Gürsoy P.
    Background/Objectives: In the REGOMA trial, regorafenib demonstrated an overall survival advantage over lomustine, and it has become a recommended treatment for recurrent glioblastoma in guidelines. This study aimed to evaluate the effectiveness and safety of regorafenib as a third-line treatment for patients with recurrent glioblastoma who progressed while taking bevacizumab-based therapy. Methods: This retrospective, multicenter study in Turkey included 65 patients treated between 2021 and 2023 across 19 oncology centers. The main inclusion criteria were histologically confirmed isocitrate dehydrogenase (IDH)-wildtype glioblastoma, progression after second-line bevacizumab-based treatment, and an Eastern Cooperative Oncology Group (ECOG) performance status score of ≤2. Patients received regorafenib 160 mg once daily for the first 3 weeks of each 4-week cycle. Results: The median age of the patients was 53 years (18–67 years), with a median progression-free survival of 2.5 months (95% Confidence Interval: 2.23–2.75) and a median overall survival of 4.1 months (95% CI: 3.52–4.68). The median overall survival was improved in patients who received subsequent therapy after regorafenib treatment compared with those who did not (p = 0.022). Progression-free survival was longer in patients with ECOG 0–1 than in those with ECOG 2 (p = 0.042). The safety profile was consistent with that of the REGOMA trial, with no drug-related deaths observed. Conclusions: Regorafenib shows good efficacy and safety as a third-line treatment for recurrent glioblastoma after bevacizumab-based therapy. This study supports the use of regorafenib and emphasizes the need for further randomized studies to validate its role and optimize treatment strategies. © 2024 by the authors.