Çağlar Ünal

Dr. Çağlar Ünal

orcid

Research Focus & Metrics

Academic Career Length

6Years (2021-Present)

(Calculated once Scilit publication data is synced: current year − year of first publication + 1)

Representative Publications

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11 June 2022 in Journal of Cancer Research and Clinical Oncology
Verified
Journal Article
Closed access
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MGMustafa Gürbüz
Mustafa Gürbüz
YKYasin Kutlu
Yasin Kutlu
EAErman Akkus
Erman Akkus
EKElif Berna Köksoy
Elif Berna Köksoy
NBNaziyet Köse Baytemür
Naziyet Köse Baytemür
ADAhmet Demirkazık
Ahmet Demirkazık

7 September 2023 in The Oncologist
Verified
Journal Article
Open access
PDF file
ÇÜÇağlar Ünal
Çağlar Ünal
AAAbdulmunir Azizy
Abdulmunir Azizy
SKSenem Karabulut
Senem Karabulut
DTDidem Taştekin
Didem Taştekin
AAArif Akyıldız
Arif Akyıldız
Sezer SaglamSezer Saglam
Sezer Saglam
This study aims to report the efficacy and safety of capecitabine plus temozolomide (CAPTEM) across different lines of treatment in patients with metastatic neuroendocrine tumors (NETs). We conducted a multicenter retrospective study analyzing the data of 308 patients with metastatic NETs treated with CAPTEM between 2010 and 2022 in 34 different hospitals across various regions of Turkey. The median follow-up time was 41.0 months (range: 1.7-212.1), and the median age was 53 years (range: 22-79). Our results across the entire patient cohort showed a median progression-free survival (PFS) of 10.6 months and a median overall survival (OS) of 60.4 months. First-line CAPTEM treatment appeared more effective, with a median PFS of 16.1 months and a median OS of 105.8 months (median PFS 16.1, 7.9, and 9.6 months in first-, second- and ≥third-line respectively, P = .01; with median OS values of 105.8, 47.2, and 24.1 months, respectively, P = .003) In terms of ORR, the first-line treatment again performed better, resulting in an ORR of 54.7% compared to 33.3% and 30.0% in the second and third or higher lines, respectively (P < .001). Grade 3-4 side effects occurred only in 22.5% of the patients, leading to a discontinuation rate of 9.5%. Despite the differences in outcomes based on treatment line, we did not observe a significant difference in terms of side effects between the first and subsequent lines of treatment. The substantial superior outcomes in patients receiving first-line CAPTEM treatment highlight its potential as an effective treatment strategy for patients with metastatic NET.

28 June 2023 in Frontiers in Oncology
Verified
Journal Article
Open access
ÇÜÇağlar Ünal
Çağlar Ünal
TÖTolga Özmen
Tolga Özmen
ÇOÇetin Ordu
Çetin Ordu
KPKezban Nur Pilanci
Kezban Nur Pilanci
AIAhmet Serkan İlgün
Ahmet Serkan İlgün
VOVahit Ozmen
Vahit Ozmen
Background: The Oncotype Dx recurrence score (ODx-RS) guides the adjuvant chemotherapy decision-making process for patients with early-stage hormone receptor-positive, HER-2 receptor-negative breast cancer. This study aimed to evaluate survival and its correlation with ODx-RS in pT1-2, N0-N1mic patients treated with adjuvant therapy based on tumor board decisions.Patients and methods: Estrogen-positive HER-2 negative early-stage breast cancer patients (pT1-2 N0, N1mic) with known ODx-RS, operated on between 2010 and 2014, were included in this study. The primary aim was to evaluate 5-year disease-free survival (DFS) rates according to ODX-RS.Results: A total of 203 eligible patients were included in the study, with a median age of 48 (range 26-75) and median follow-up of 84 (range 23-138) months. ROC curve analysis for all patients revealed a recurrence cut-off age of 45 years, prompting evaluation by grouping patients as ≤45 years vs. >45 years. No significant difference in five-year DFS rates was observed between the endocrine-only (ET) and chemo-endocrine (CE) groups. However, among the ET group, DFS was higher in patients over 45 years compared to those aged ≤45 years. When stratifying by ODx-RS as 0-17 and ≥18, DFS was significantly higher in the former group within the ET group. However, such differences were not seen in the CE group. In the ET group, an ODx-RS ≥18 and menopausal status were identified as independent factors affecting survival, with only an ODx-RS ≥18 impacting DFS in patients aged ≤45 years. The ROC curve analysis for this subgroup found the ODx-RS cut-off to be 18.Conclusion: This first multicenter Oncotype Dx survival analysis in Turkey demonstrates the importance of Oncotype Dx recurrence score and age in determining treatment strategies for early-stage breast cancer patients. As a different aproach to the literature, our findings suggest that the addition of chemotherapy to endocrine therapy in young patients (≤45 years) with Oncotype Dx recurrence scores of ≥18 improves DFS.

10 November 2023 in Medicine
Verified
Journal Article
Open access
AAArif Akyildiz
Arif Akyildiz
DGDeniz Can Guven
Deniz Can Guven
AOAhmet Anil Ozluk
Ahmet Anil Ozluk
RIRashad Ismayilov
Rashad Ismayilov
EMEmel Mutlu
Emel Mutlu
SYSuayib Yalcin
Suayib Yalcin
The aim of the study was to evaluate the real-world clinical outcomes of atezolizumab and bevacizumab (Atez/Bev) as the initial therapy for advanced hepatocellular carcinoma (HCC). We retrospectively analyzed 65 patients treated with Atez/Bev for advanced HCC from 22 institutions in Turkey between September 2020 and March 2023. Responses were evaluated by RECIST v1.1 criteria. The median progression-free survival (PFS) and overall survival (OS) were calculated using the Kaplan–Meier method. Cox regression model was employed to conduct multivariate analyses. The median age was 65 (range, 22–89) years, and 83.1% of the patients were male. A total of 1.5% achieved a complete response, 35.4% had a partial response, 36.9% had stable disease, and 26.2% had progressive disease. The disease control rate was 73.8% and associated with alpha-fetoprotein levels at diagnosis and concomitant antibiotic use. The incidence rates of any grade and grade ≥ 3 adverse events were 29.2% and 10.7%, respectively. At a median follow-up of 11.3 (3.4–33.3) months, the median PFS and OS were 5.1 (95% CI: 3–7.3) and 18.1 (95% CI: 6.2–29.9) months, respectively. In univariate analyses, ECOG-PS ≥ 1 (relative to 0), Child-Pugh class B (relative to A), neutrophil-to-lymphocyte ratio (NLR) > 2.9 (relative to ≤ 2.9), and concomitant antibiotic use significantly increased the overall risk of mortality. Multivariate analysis revealed that ECOG-PS ≥ 1 (HR: 2.69, P = .02), NLR > 2.9 (HR: 2.94, P = .017), and concomitant antibiotic use (HR: 4.18, P = .003) were independent predictors of OS. Atez/Bev is an effective and safe first-line therapy for advanced-stage HCC in a real-world setting. The survival benefit was especially promising in patients with a ECOG-PS score of 0, Child-Pugh class A, lower NLR, and patients who were not exposed to antibiotics during the treatment.

23 June 2023 in Current Medical Research and Opinion
Verified
Journal Article
Closed access
ÇÜÇağlar Ünal
Çağlar Ünal
GTGulsah Tuncer
Gulsah Tuncer
BÇBetül Çopur
Betül Çopur
KPKezban Nur Pilanci
Kezban Nur Pilanci
KOKEREM OKUTUR
KEREM OKUTUR
Çetin OrduÇetin Ordu
Çetin Ordu
We aimed to identify a rapid, accurate and accessible biomarker in the early stages of COVID-19 that can determine the prognosis of the disease in cancer patients. A total number of 241 patients with solid cancers who had COVID-19 diagnosis between March 2020 and February 2022 were included in the study. Factors and markers of inflammation were analyzed by year of diagnosis of COVID-19 and grouped by severity of infection. Hospitalization, referral to the intensive care unit (ICU), mechanical ventilation and death were more frequent in 2020 than in 2021 and 2022. (mortality rates respectively 18.8%, 3.8% and 2.5%) Bilateral lung involvement and chronic lung disease were independent risk factors for severe disease in 2020. In 2021-2022, only bilateral lung involvement was found as an independent risk factor for severe disease. The neutrophil to lymphocyte, platelet ratio (NLPR) with the highest area under the curve (AUC) value in 2020 had a sensitivity of 71.4% and specificity of 73.3% in detecting severe disease (cut-off > 0.0241, Area Under the Curve (AUC) =0.842, p < 0.001). In 2021-2022, the sensitivity of the C-reactive protein to lymphocyte ratio (CRP/L) with the highest AUC value was 70.0%, and the specificity was 73.3% (cut-off > 36.7, AUC = 0.829, p = 0.001). This is the first study to investigate the distribution and characteristics of cancer patients diagnosed with COVID-19. Based on the data from our study, bilateral lung involvement is an independent factor for severe disease, and the CRP/L inflammation index appears to be the most reliable prognostic marker.