Browsing by Author "Tunc, Sezai"

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Comparison of First-Line Chemotherapeutics and Validation of the Eortc Prognostic Index in Malignant Pleural Mesothelioma: Retrospective Single-Centre Experience
(Coll Physicians & Surgeons Pakistan, 2024) Sezgin, Yasin; Karhan, Ogur; Ileri, Serdar; Ebinc, Senar; Tunc, Sezai; Urakci, Zuhat
Objective: To evaluate the efficiency of pemetrexed cisplatin in comparison with gemcitabine cisplatin and to validate the EORTC (European Organisation for Research and Treatment of Cancer) prognostic score in combination chemotherapy treatment for malignant pleural mesothelioma. Study Design: An observational study. Place and Duration of the Study: Department of Oncology, Dicle University Hospital, Diyarbakir, Turkiye, from October 2000 to Methodology: Malignant pleural mesothelioma (MPM) patients with EORTC score 0- were recruited. Factors affecting the prognosis of the disease and the effectiveness of first-line treatment were retrospectively analysed. EORTC prognostic score was calculated with a cut-off and survival analyses were used by the Kaplan-Meier method. Log-rank and univariable Cox regression tests were used to search for prognostic factors' impact on survival. Results: Patients who received gemcitabine cisplatin treatment had a median progression-free survival (PFS) of 9 months, while those who received pemetrexed cisplatin therapy had a median PFS of 7 months. Median overall survival (OS) was 17 months in the gemcitabine cisplatin group and 18 months in the pemetrexed cisplatin group (p = 0.051). When the low-risk group was compared with the high-risk group, the median OS was found to be statistically significant (p = 0.009). Conclusion: The EORTC prognostic score, which is used for prognostic prediction in the period when pemetrexed is not utilised in the treatment of MPM, accurately predicts prognosis subsequent to the administration of pemetrexed in treatment. In the context of first-line treatment, cisplatin in combination with gemcitabine and cisplatin in combination with pemetrexed demonstrated comparable efficacy with respect to both overall survival and progression-free survival.
Concomitant Use of Proton Pump Inhibitors and Cdk4/6 Inhibitors in Metastatic Hormone-Positive Breast Cancer: a Real-World Cohort Study
(Karger, 2024) Karhan, Ogur; Ileri, Serdar; Urakci, Zuhat; Arvas, Hayati; Kilic, Delyadil Karakas; Sezgin, Yasin; Tunc, Sezai
Introduction: Conflicting evidence exists regarding the concurrent use of cyclin-dependent kinase (CDK) 4/6 inhibitors and proton pump inhibitors (PPIs) in the treatment of breast cancer. This study aimed to investigate whether PPI use interferes with the efficacy of CDK4/6 inhibitors. Methods: This retrospective, multicenter, real-world study included 205 patients with hormone receptor-positive, HER2-negative metastatic breast cancer. Patient data were collected from January 2020 to August 2023. Patients who received either ribociclib or palbociclib, with or without a PPI, were included. Median progression-free survival (mPFS) was estimated using the Kaplan-Meier method, and factors associated with mPFS were analyzed using Cox regression. Results: Among the patients, 100 received palbociclib and 105 received ribociclib. In the palbociclib group, 40 patients (40%) used a PPI, and 60 (60%) did not. The mPFS was 16.1 months for patients with a PPI versus 22.2 months for those without (p = 0.26). In the ribociclib group, 44 patients used a PPI and 61 did not use a PPI. The median PFS was comparable between patients receiving PPIs and those not receiving PPIs (19.3 months and 20.7 months, respectively). Poor PFS was associated with liver metastasis, brain metastasis, and high Ki-67. Conclusion: Concomitant use of PPIs with ribociclib or palbociclib did not affect the efficacy of either CDK4/6 inhibitor. PPIs can be administered alongside these medications when clinically indicated. (c) 2024 S. Karger AG, Basel.