Browsing by Author "Yavuz, Adem"

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Neutrophil-to-Lymphocyte Ratio and Platelet-to-Lymphocyte Ratio in Discriminating Precancerous Pathologies from Cervical Cancer
(HINDAWI LTD, 2019-01-01) Tas, Mustafa; Yavuz, Adem; Ak, Mehmet; Ozcelik, Bulent
Purpose. We aimed to determine the predictive value of several hematological markers of inflammation on the presence/absence of cervical cancer and also to determine their ability in discriminating precancerous cervical pathologies from cervical cancer. Materials and Methods. In this study, patients who presented to Acibadem Kayseri Hospital between May 2010 and June 2018 were evaluated. Forty patients with low-grade squamous intraepithelial lesions (LSIL), 40 patients with high-grade squamous intraepithelial lesions (HSIL), and 30 patients with cervical cancer (CC) were retrospectively included in this study. A control group of 70 healthy volunteers with normal cervical cytology was also included in the study. Results. The neutrophil-to-lymphocyte ratio (NLR) was significantly higher in patients with CC than in controls. The platelet-to-lymphocyte ratio (PLR) was significantly higher in patients with CC compared to those with LSIL and HSIL diagnoses and also controls (p<0.001). Logistic regression analysis revealed that age (OR: 1.075, 95\% CI: 1.020-1.132, p=0.007), NLR (OR: 1.643, 95\% CI: 1.009-3.142, p=0.047), and PLR (OR: 1.032, 95\% CI: 1.003-1.062, p=0.029) were predictors for the presence of CC. ROC curve analysis revealed that both NLR and PLR were predictive of CC with a cutoff value of 2.02 for NLR (71\% sensitivity and 60\% specificity, AUC: 0.682, p=0.004) and 126.7 for PLR (83\% sensitivity and 69\% specificity, AUC: 0.752, p<0.001). Conclusion. In addition to patients' age, determination of NLR and PLR values, which are simple, inexpensive, and readily available markers of systemic inflammation, may help in decision making precancerous pathologies of the cervix.
The Effects of an Absorbable Hemostat Produced From Oxidized Regenerated Cellulose on Adhesion Formation in a Rat Mode
(GALENOS YAYINCILIK, 2021-01-01) Yavuz, Adem; Oner, Gokalp; Tas, Mustafa; Cinaroglu, Selim
Objective: This study aimed to analyze the effect of an absorbable hemostat produced from oxidized regenerated cellulose (ORC) on pelvic adhesion formation in a rat model using an adhesion scoring system and immunohistochemical staining. Methods: This randomized, controlled experimental study included 20 female Wistar-Albino rats that were equally divided into the following groups: control and absorbable hemostat groups. The uterine horns of all the rats were exposed by laparotomy and using 10 W bipolar cautery. Five standard lesions were applied to the antimesenteric areas of each uterine horn. The experimental group received an absorbable hemostat to the traumatized uterine surfaces, whereas the control group did not. After a 28-day follow-up period, a relaparotomy was performed, and adhesions were evaluated based on an adhesion scoring system, and histological sections from areas with adhesion were obtained for immunohistochemical staining. Immunohistochemical staining included analysis of Ki-67 (proliferation index), CD-31 (neovascularization index), and Masson Trichrome {[}(MTC) fibrosis and collagen formation index]. Additionally, acute and chronic inflammation indices were determined via polymorphonuclear leukocytes (PMNL) and mononuclear leukocytes (MNL), respectively. Results: The intensity and scope of adhesion and overall adhesion ratings were substantially higher in the absorbable hemostat group than the control group (2.8 +/- 0.85 vs. 2.2 +/- 0.53, 0.92 +/- 0.26 vs. 0.61 +/- 0.25, and 3.72 +/- 0.96 vs. 2.81 +/- 0.75, respectively). Staining results for Ki-67, CD-31, MTC, PMNL, and MNL were also significantly higher in the absorbable hemostat group than in the control group (p<0.05 for all). Conclusion: The obtained results suggest that the use of ORC-based absorbable hemostats in pelvic surgery may increase adhesion formation on peritoneal surfaces by increasing inflammation, vascularity, and collagen formation.