Omer Fatih Olmez

Prof. Dr. Omer Fatih Olmez


Research Focus & Metrics

Academic Career Length

14Years (2013-Present)

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

Representative Publications

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28 July 2015
Verified
Journal Article
Closed access
AUArife Ulas
Arife Ulas
NANilufer Avci
Nilufer Avci
TKTugba Kos
Tugba Kos
ECErdem Cubukcu
Erdem Cubukcu
OOOmer Fatih Olmez
Omer Fatih Olmez
MDMustafa Degirmenci
Mustafa Degirmenci

6 June 2013 in Clinical and Translational Oncology
Verified
Journal Article
Closed access
PDF file
OOOmer Fatih Olmez
Omer Fatih Olmez
ECE. Cubukcu
E. Cubukcu
TET. Evrensel
T. Evrensel
MKMeral Kurt
Meral Kurt
NAN. Avci
N. Avci
OMO. Manavoglu
O. Manavoglu

14 April 2023 in Medicine
Verified
Journal Article
Open access
YKYasin Kutlu
Yasin Kutlu
SASabin Goktas Aydin
Sabin Goktas Aydin
ABAhmet Bilici
Ahmet Bilici
BObasak oven
basak oven
OOOmer Fatih Olmez
Omer Fatih Olmez
JHJamshid Hamdard
Jamshid Hamdard
Atezolizumab is now the standard treatment for extensive-stage small cell lung cancer (ES-SCLC). Herein, we investigated the prognostic role of inflammatory markers in patients treated with atezolizumab plus chemotherapy and evaluated the efficacy and safety of adding atezolizumab to chemotherapy for patients with ES-SCLC and prognostic and predictive factors as a real-life experience. This retrospective study included 55 patients who received front-line atezolizumab with etoposide plus platin regimen for ES-SCLC. We analyzed the survival outcomes and factors that may predict response and survival. The objective response rate (ORR) was 81.8%. At a median follow-up of 23.5 months, the median progression-free survival (PFS) time was 10.8 months, and the median overall survival (OS) time was 15.2 months. In univariate analysis for PFS, limited-stage disease at the time of diagnosis, the presence of prophylactic cranial irradiation (PCI), the presence of liver metastasis, neutrophil-lymphocyte ratio (NLR), and platelet-lymphocyte ratio (PLR) were found to be prognostic factors (P = .041, P = .034, P = .031, P = .004, and P = <.001, respectively). In other words, while the median PFS time was 14.1 months in patients with PLR ≤ 135.7, it was 7.5 months in patients with > 135.7. Similarly, median PFS was 14.9 months in patients with NLR ≤ 3.43, while it was 9.6 months in patients with > 3.43. Univariate analysis for OS revealed that limited stage at the time of diagnosis, NLR and PLR were significant prognostic indicators (P = .01, P = .006, and P = .007, respectively). Median OS time for patients with both NLR ≤ 3.43 and PLR ≤ 135.7 was significantly better than that of patients with NLR > 3.43 and PLR > 135.7 (16.9 vs 11.3 and 16.9 vs 11.5 months, respectively). Logistic regression analysis demonstrated that PLR was an independent significant predictive factor for the response to atezolizumab plus chemotherapy (OR: 0.07, P = .028). The patients with PLR ≤ 135.7 were significantly good responders to atezolizumab plus chemotherapy treatment. Real-life data demonstrated a significant correlation between survival and NLR and, PLR in ES-SCLC patients treated with atezolizumab. In addition, PLR was a significant predictive indicator of response to atezolizumab plus chemotherapy.

30 November 2023 in Pulmonology
Verified
Journal Article
Open access
OOOmer Fatih Olmez
Omer Fatih Olmez
ABA. Bilici
A. Bilici
PGP. Gursoy
P. Gursoy
ECE. Cubukcu
E. Cubukcu
ASA. Sakin
A. Sakin
JHJamshid Hamdard
Jamshid Hamdard
To evaluate the prognostic utility of inflammation-based prognostic scores in patients with ALK-positive metastatic or non-resectable non-small-cell lung cancer (NSCLC) treated with crizotinib. A total of 82 patients with ALK-positive metastatic or non-resectable NSCLC who received ALK TKI crizotinib were included. Pre-treatment modified Glasgow prognostic score (mGPS), prognostic nutritional index (PNI), and systemic immune-inflammation index (SII) were calculated. Multivariable logistic regression and Cox proportional hazards models were used to assess the impact of pretreatment mGPS, PNI, and SII on overall survival (OS), progression-free survival (PFS), and objective response rate (ORR). The ORR was 77.2%, while 1-year OS and PFS rates were 95.0% and 93.5%, respectively. The univariate analysis revealed significantly higher 1-year PFS (89.4 vs. 64.4%, p=0.043) and OS (92.0 vs. 83.3%, p=0.01) rates in patients with low (<934.7) vs. high (≥934.7) SII scores. Multivariate analysis revealed that PNI ≥0.09 was a significant determinant of poorer 1-year OS rates (hazard ratio [HR]: 2.46, 95% confidence interval [CI] 0.88-4.85, p=0.035). No significant difference was observed in survival rates according to gender, age, smoking status, prior lines of therapy, or mGPS scores, while higher mGPS scores (odds ratio [OR]: 0.1, 95%CI 0.16-1.04; p=0.009) and higher PNI scores (OR: 0.16, 95% CI 0.02-0.55; p=0.035) were associated with poorer ORR. Our findings indicate the prognostic significance of PNI and SII in terms of survival outcome and the impact of mGPS and PNI on treatment response in patients with ALK-positive NSCLC treated with crizotinib.

14 January 2025 in Medicina
Verified
Journal Article
Open access
MDMeriç Dökmetaş
Meriç Dökmetaş
HMHarun Muğlu
Harun Muğlu
EOErkan Ozcan
Erkan Ozcan
BKBuket Bayram Kuvvet
Buket Bayram Kuvvet
KHKaan Helvacı
Kaan Helvacı
ABAhmet Bilici
Ahmet Bilici
Background and Objectives: Immune checkpoint inhibitors (ICIs) have revolutionized cancer therapy, but their use is associated with a spectrum of immune-related adverse events (irAEs), including endocrine disorders. This study aims to investigate the incidence, timing, treatment modalities, and impact of ICI-related endocrine side effects in cancer patients. Materials and Methods: This retrospective study analyzed 139 cancer patients treated with ICIs between 2016 and 2022. Data regarding endocrine irAEs, including hypothyroidism, hyperthyroidism, hypophysitis, and diabetes mellitus, were collected. The study examined the timing of irAE onset, management approaches, and the association between irAEs and treatment outcomes. Results: The most common endocrine irAE was hypothyroidism (65.5%), followed by hyperthyroidism (2.3%), hypophysitis (8.6%), and diabetes mellitus (0.7%). These disorders typically emerged within the first six months of ICI therapy. Most cases were managed conservatively or with hormone replacement therapy. Patients who developed endocrine irAEs exhibited a higher objective response rate (ORR) and clinical benefit rate (CBR) compared to those without irAEs. Conclusions: Endocrine dysfunction is a significant toxicity of ICI therapy. Early recognition, prompt diagnosis, and appropriate management are crucial to minimize their impact on patient health and quality of life. This study highlights the potential association between irAEs and improved clinical outcomes. Further research is needed to elucidate the underlying mechanisms and identify predictive biomarkers for irAE development.

11 June 2022 in Journal of Cancer Research and Clinical Oncology
Verified
Journal Article
Closed access
PDF file
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