2020-08-28T00:00:00Z, Saribas, S, Demiryas, S, Uysal, O, Yilmaz, E, Kepil, N, Demirci, M, Caliskan, R, Dinc, HARİKA ÖYKÜ, Akkus, S, Gareayaghi, N, Kirmusaoglu, S, Ozbey, D, Tokman, HB, Koksal, SS, Tasci, I, Kocazeybek, B, UYSAL, ÖMER, DİNÇ, HARİKA ÖYKÜ

Background: Polymorphisms of human leukocyte antigen (HLA) genes are suggested to increase the risk of gastric cancer (GC). Aim: To investigate the HLA allele frequencies of patients with GC relative to a control group in terms of CagA+ multiple (≥ 2) EPIYA-C repeats. Methods: The patient group comprised 94 patients [44 GC and 50 duodenal ulcer (DU) patients], and the control group comprised 86 individuals [(50 non-ulcer dyspepsia patients and 36 people with asymptomatic Helicobacter pylori (H. pylori)]. Polymerase chain reaction was performed for the amplification of the H. pylori cagA gene and typing of EPIYA motifs. HLA sequence-specific oligonucleotide (SSO) typing was performed using Lifecodes SSO typing kits (HLA-A, HLA-B HLA-C, HLA-DRB1, and HLA-DQA1-B1 kits). Results: The comparison of GC cases in terms of CagA+ multiple (≥ 2) EPIYA-C repeats showed that only the HLA-DQB1*06 allele [odds ratio (OR): 0.37, P = 0.036] was significantly lower, but significance was lost after correction (Pc = 0.1845). The HLA-DQA1*01 allele had a high ratio in GC cases with multiple EPIYA-C repeats, but this was not significant in the univariate analysis. We compared allele frequencies in the DU cases alone and in GC and DU cases together using the same criterion, and none of the HLA alleles were significantly associated with GC or DU. Also, none of the alleles were detected as independent risk factors after the multivariate analysis. On the other hand, in a multivariate logistic regression with no discriminative criterion, HLA-DQA1*01 (OR = 1.848), HLA-DQB1*06 (OR = 1.821) and HLA-A*02 (OR = 1.579) alleles were detected as independent risk factors for GC and DU. Conclusion: None of the HLA alleles were detected as independent risk factors in terms of CagA+ multiple EPIYA-C repeats. However, HLA-DQA1*01, HLA-DQB1*0601, and HLA-A*2 were independent risk factors with no criterion in the multivariate analysis. We suggest that the association of these alleles with gastric malignancies is not specifically related to cagA and multiple EPIYA C repeats.

2021-06-01T00:00:00Z, Güler, Beril, Adilli, Adila, Uysal, Ömer, GÜLER, BERIL, ERDOĞAN, EZGİ BAŞAK, UYSAL, ÖMER

Aim: Lymphoma staging is important from the prognostic and therapeutic point of view and bone marrow biopsy performed for this purpose makes up a large part of current hematopathology practice. PET-CT is the currently preferred method to evaluate bone marrow involvement by lymphoproliferative disorders as it is non-invasive and practical. The aim of this study was to compare trephine biopsy and PET-CT results as regards determining bone marrow involvement in various lymphoma subtypes. Materials and Methods: A total number of 198 bone marrow biopsies and 185 PET-CT images of cases consisting of various lymphoma subtypes were included in the study. The results of both methods evaluated for bone marrow infiltration were grouped as positive, negative, and suspicious to compare consistency. Statistical agreement was calculated with the kappa coefficient. The sensitivity, specificity, and the positive and negative predictive values were calculated as the diagnostic test measures. Results: Twenty-six cases (15.8%) had lymphoma involvement in trephine biopsies and 36 cases (21.2%) had positive findings for lymphoma involvement of the bone marrow on PET-CT. The two methods had weak statistical agreement (κ= 0.21). Biopsy and PETCT results were similar in 132 cases (71.20%). PET-CT showed false negative results in 11 cases in which infiltration was observed with biopsy. Twenty-six cases that were negative for lymphoma involvement on biopsy were accepted as positive on PET-CT and 16 of these cases were classical Hodgkin-s lymphoma. One case with suspicious bone marrow biopsy was positive on PET-CT, while four cases with suspicious PET-CT results were positive on biopsy. Conclusion: The results showed that both of the methods have advantages and disadvantages as regards lymphoma staging. However, histopathology is globally accepted as the gold standard for a definite diagnosis. We believe that the complementary use of the two methods is more beneficial for correct guidance during clinical practice.

2020-06-01T00:00:00Z, Peker, Kadriye, EDEN, ECE, AK, ASLI TOPALOĞLU, UYSAL, ÖMER, Bermek, Gulcin, UYSAL, ÖMER

Background As patient-reported outcome, the Child Oral Impacts on Daily Performances (C-OIDP) has been commonly used for assessing children-s oral health needs in order to facilitate oral health service planning. It was translated and cross-culturally adapted into Turkish in 2008. Since then, there is no study to assess its psychometric properties in Turkish child population. This cross-sectional study aimed to investigate the psychometric properties and factor structure of the Turkish version of the C-OIDP for use in Turkish primary school children. Methods The Turkish translated version was tested on a convenience sample of primary school children aged 11 to 12 years attending two public schools in Istanbul. Data were collected by clinical examinations, face-to-face interviews and self-completed questionnaires. The internal consistency, test-retest reliability, construct validity using exploratory factor analysis (EFA) and confirmatory factor analysis (CFA), criterion related validity (concurrent and discriminant) were evaluated. Results A total of 208 children were subjected to the tested the C-OIDP. Overall, 93.7% of them reported at least one oral impact in the last 3 months. The most frequently affected performances were -eating- (72.1%) and -cleaning mouth-, while the performance with the lowest impact was -studying- (13%). The internal consistency and reproducibility of the C-OIDP were acceptable, with a Cronbach-s alpha of 0.73 and an intra-class correlation coefficient of 0.83. The EFA yielded a two-factor model termed -functional limitation- and -psychosocial limitation-. CFA identified the two- factor model which fit the data better than the previously proposed three-factor model, namely physical, psychological and social health. Having malocclusion, the presence of gum disease, reported history of oral problems in the mouth, dissatisfaction with oral health, bad self-rated oral health and having a problem-oriented pattern of dental attendance were found to be the most important factors related to worse oral health- related quality of life, supporting its criterion-related validity. Conclusion This study provided preliminary evidence the psychometric properties of the C-OIDP index among Turkish school children aged 11-12 years. It may be applied to evaluate the oral health impact on quality of life in this population.

2021-03-01T00:00:00Z, ÇEŞME, DİLEK HACER, ALKAN, ALPAY, GÜLTEKİN, MEHMET ALİ, SARI, LÜTFULLAH, Alkan, Gokberk, KAYA, AHMET, MAYADAĞLI, Alpaslan, Akdur, Kerime, UYSAL, ÖMER, HATİBOĞLU, MUSTAFA AZİZ, ÇEŞME, DİLEK HACER, ALKAN, ALPAY, GÜLTEKİN, MEHMET ALİ, SARI, LÜTFULLAH, KAYA, AHMET, MAYADAĞLI, ALPASLAN, UYSAL, ÖMER, HATİBOĞLU, MUSTAFA AZİZ

Objective In this study, we aimed to investigate whether there is any change in diffusion tensor imaging (DTI) parameters in ipsilateral and contralateral auditory pathways after Gamma Knife radiosurgery (GKR) in patients with vestibular schwannoma (VS) and the relationship between radiosurgery variables. Methods Sixty-six patients were evaluated with MRI and DTI before and after GKR. The apparent diffusion coefficient (ADC) and fractional anisotropy (FA) were measured from the bilateral lateral lemniscus (LL), inferior colliculus (IC), medial geniculate body (MGB), and Heschl's gyrus (HG). Results There was no significant difference in ADC and FA values obtained from bilateral LL, IC, and MGB before and after radiosurgery. However, there was a significant difference between pretreatment and post-radiosurgery contralateral HG ADC values. The ADC values obtained from the contralateral HG and IC positively correlated with the duration after radiosurgery. As the duration after radiosurgery increases, the difference between the ADC values obtained from ipsilateral and contralateral HG also increases. Conclusion The high ADC values in the contralateral HG after radiosurgery may indicate microstructural alterations such as demyelination and axonal loss. Radiation exposure doses to the brainstem and cochlea are the most important factors that can cause microstructural damage to the auditory pathways. When planning radiosurgery, extreme care should be taken to prevent the harmful effects of radiation on the auditory pathways.

2022-01-01T00:00:00Z, DÜNDAR, TOLGA TURAN, Cetinkaya, Ezra, YURTSEVER, İSMAİL, Uysal, Ömer, Aralaşmak, Ayşe, DÜNDAR, TOLGA TURAN, ÇETİNKAYA, EZRA, YURTSEVER, İSMAİL, UYSAL, ÖMER

Purpose: To search for the utility of DCE-MRP to differentiate between posttreatment enhancement (PT) and tumoral enhancement (TM) in high-grade glial tumors. Materials and methods: Thirty-four patients with glioma (11 grade 3; 23 grade 4) were enrolled. Enhancement in the vicinity of the resection cavity demonstrated by DCE-MRP was taken into consideration. Based on the follow-up scans, reoperation or biopsy results, the enhancement type was categorized as PT or TM. Measurements were performed at the enhancing area near the resection cavity (ERC), nearby (NNA) and contralateral nonenhancing areas (CLNA). Perfusion parameters of the ERC were also subtracted from NNA and CLNA. Intragroup comparison (paired sample t-test) and intergroup comparison (Student's t-test) were made. Results: There were 7 PTs and 27 TMs. In the PT, the subtracted values of Ve and IAUC from the CLNA and NNA and the subtracted value of Kep from NNA were statistically different. In TM, all metrics were significantly different comparing the CLNA and NNA. Comparing PT with TM, Ktrans, IAUC, Kep, and subtracted values of Ktrans and IAUC from both NNA and CLNA were significantly different. Conclusions: In PT, only Ktrans values did not reveal any difference comparing NNA and CLNA. To differentiate PT from TM, Ktrans, Kep, IAUC, and subtracted values of Ktrans and IAUC from NNA and CLNA can be used. These findings are in concordance with literature.

2020-12-11T00:00:00Z, Köker, İbrahim Hakkı, Ünver, Nurcan, Malya, Fatma Ümit, Uysal, Ömer, Keskin, Elmas Biberci, Şentürk, Hakan, MALYA, FATMA ÜMİT, UYSAL, ÖMER, BİBERCİ KESKİN, ELMAS, ŞENTÜRK, HAKAN

Background/aims: The role of cyst fluid carcinoembryonic antigen (CEA) level in differentiating mucinous pancreatic cystic lesions (PCLs) is controversial. We investigated the role of cyst fluid CEA in differentiating low-risk (LR)-intraductal papillary mucinous neoplasms (IPMNs) from high-risk (HR)-IPMNs and LR-mucinous cystic neoplasms (MCNs). Methods: This was a retrospective study of 466 patients with PCLs who underwent endoscopic ultrasound-guided fine-needleaspiration over a 7-year period. On histology, low-grade dysplasia and intermediate-grade dysplasia were considered LR, whereas high-grade dysplasia and invasive carcinoma were considered HR. Results: Data on cyst fluid CEA levels were available for 50/102 mucinous PCLs with definitive diagnoses. The median CEA (range) levels were significantly higher in HR cysts than in LR cysts (2,624 [0.5-266,510] ng/mL vs. 100 [16.8-53,445]ng/mL, p=0.0012). The area under the receiver operating characteristic curve (AUROC) was 0.930 (95% confidence interval [CI], 0.5-0.8; p<0.001) for differentiating LR-IPMNs from LR-MCNs. The AUROC was 0.921 (95% CI, 0.823-1.000; p<0.001) for differentiating LR-IPMNs from HR-IPMNs. Both had a CEA cutoff level of >100ng/mL, with a negative predictive value (NPV) of 100%. Conclusion: Cyst fluid CEA levels significantly vary between LR-IPMNs, LR-MCNs, and HR-IPMNs. A CEA cutoff level of >100ng/mL had a 100% NPV in differentiating LR-IPMNs from LR-MCNs and HR-IPMNs.

2021-10-01T00:00:00Z, Gareayaghi, Nesrin, Akkus, Seher, Saribas, Suat, Demiryas, Suleyman, Ozbey, Dogukan, Kepil, Nuray, Demirci, Mehmet, DİNÇ, HARİKA ÖYKÜ, Akcin, Ruveyda, Uysal, Omer, Tokman, Hrisi Bahar, Kocazeybek, Bekir, DİNÇ, HARİKA ÖYKÜ, UYSAL, ÖMER

We aimed to detect EBV/Hp (Epstein-Barr Virus/Helicobacter pylori) co-infection by determining the number of copies of EBV/EBER-1 in the gastric biopsy samples of the Hp (+) GC, peptic ulcer (PU), and non-ulcer dyspepsia (NUD) cases.