Browsing by Author "Ocak, Birol"

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    The Clinical Importance of Fibroblast Growth Factor 23 on Advanced Non-Small Cell Lung Cancer Patients Without Druggable Alterations in Genes as Egfr or Alk or Ros1 Fibroblast Growth Factor 23 and Non-Small Cell Lung Cancer
    (2020) Cihan, Şener; Çekin, Ruhper; Seçmeler, Şaban; Atcı, Muhammed Mustafa; Ocak, Birol; Sakin, Abdullah; Arıcı, Serdar
    Objectives: We aimed to investigate the relation between serum fibroblast growth factor (FGF) 23 levels and clinicopathologic features of stage 3B and 4 non-small cell lung cancer (NSCLC) patients without druggable alterations ingenes as epidermal growth factor receptor (EGFR) or rearrangements of the anaplastic lymphoma kinase (ALK) or c-ROSoncogene 1 (ROS1), by comparing healthy control group.Methods: This was a prospective, single-center study. Newly diagnosed stage 3B and 4 NSCLC patients without druggable alterations in genes as EGFR, ALK or ROS1 and healthy control in similar age, without any chronic disease andvitamin D deficiency were enrolled in the study. Fibroblast growth factor 23 levels were compared between groups.Results: Forty men newly diagnosed stage 3B and 4 patients and 24 healthy men were enrolled. The median age ofpatients and controls were 54.7 and 53.1 years. The number of patients were 22 (55.0%) and 18 (45.0%) in stage 3B andstage 4 groups respectively. The mean FGF 23 level was calculated as 87.7±58.0 pg/ml in patients group and 63.1±11.4pg/ml in control group (p=0.045). Fibroblast growth factor 23 levels were 85.5±42.5 pg/ml and 89.6±69.1 in metastaticand non-metastatic patients respectively (p=0.532). The median FGF 23 levels were 91.1±58.4 pg/ml and 92.5±60.8 pg/ml in squamous cell carcinoma and adenocarcinoma groups respectively (p=0.926).Conclusion: Our study suggests that high FGF-FGFR interaction may be causative for stage 3B and 4 NSCLC withoutdruggable alterations in genes as EGFR, ALK or ROS1 and is important in terms of suggesting the FGF pathway as a newtreatment target in NSCLC patients.
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    Long-Term Oncological Outcomes for Locally Advanced Rectal Cancer Patients With Pathological Complete Response After Neoadjuvant Chemoradiotherapy: A Turkish Oncology Group Study
    (Taylor & Francis Inc, 2025) Uysal, Mukremin; Saglam, Sezer; Beypinar, Ismail; Saglam, Esra Kaytan; Mammadov, Elkhan; Ocak, Birol; Karabulut, Bulent
    The goal of this study was to look at the long-term survival outcomes and clinical characteristics of stage II/III locally advanced rectal cancer (LARC) patients who acquired pathological complete response (pCR) following neoadjuvant chemoradiotherapy (NCRT). The clinicopathological characteristics and treatment details of 277 LARC patients with pCR, relapse-free survival (RFS), overall survival (OS), and locoregional and systemic recurrence rates, were assessed. The 5-year RFS and OS rates were 85.6% and 90.9%. The rates of local and systemic recurrence were 3.6% and 7.9%. Our study confirmed the favorable results in survival in patients with LARC who achieved pCR