Person: OYSU, ÇAĞATAY
Loading...
Email Address
Birth Date
Research Projects
Organizational Units
Job Title
Last Name
OYSU
First Name
ÇAĞATAY
Name
10 results
Search Results
Now showing 1 - 10 of 10
Publication Metadata only Dynamic contrast-enhanced MRI in the differentiation of posttreatment fibrosis from recurrent carcinoma of the head and neck(ELSEVIER SCIENCE INC, 2005) OYSU, ÇAĞATAY; Oysu, AS; Ayanoglu, E; Kodalli, N; Oysu, C; Uneri, C; Erzen, CObjective: The aim of this study was to investigate the value of dynamic contrast-enhanced magnetic resonance imaging (MRI) in the differentiation of posttreatment fibrosis from recurrent carcinoma, by comparing the dynamic contrast-enhancement characteristics of the lesions. Materials and methods: Twenty-six patients with previously treated carcinoma of the head and neck are studied by conventional and dynamic contrast-enhanced MRI at least 6 months after treatment by radiotherapy and/or surgery. Patients are divided into tumor-positive or -negative groups according to the radiological and clinical follow-up and biopsy. Lesion enhancement ratios at each dynamic sequence are calculated. Results: The tumor-positive group consisted of 11 patients, while the tumor-negative group included 15 patients. Between the two groups, lesion enhancement ratios are found to be significantly different (P<.05). Conclusion: Dynamic contrast-enhanced MRI may be a valuable modality in the differentiation of recurrent tumor from posttreatment fibrotic changes of the head and neck. (c) 2005 Elsevier Inc. All rights reserved.Publication Metadata only Correlation of Histopathological Findings in Laryngeal Squamous Cell Carcinoma with Inflammatory Biomarkers(DEOMED PUBL, ISTANBUL, 2019) OYSU, ÇAĞATAY; Deveci, Ildem; Surmeli, Mehmet; Onder, Serap; Karabulut, Burak; Deveci, Hande Senem; Oysu, CagatayObjective: The goal of this research was to investigate how biomarkers, i.e. SII (an index calculated from blood counts of various leucocytes), NLR and MLR correlate with features used in the staging of laryngeal squamous cell carcinoma (LSCC), i.e. perineural infiltration, lymphatic involvement and histological grade. Methods: A retrospective review of clinical records from 146 cases (143 men and 3 women) of LSCC occurring between January 2008 and January 2018 was undertaken. The sample included every stage of LSCC and all biomarker results were found from the full blood count (FBC) results obtained prior to surgery and documented for each case. SII is a newly introduced index of inflammation calculated according to the formula: SII = NxP/L, where N represents neutrophil, P platelet and L lymphocyte counts. Histopathological parameters (presence of perineural or lymphatic involvement, grade of tumour) were evaluated alongside results for NLR, MLR and SII. Results: All three biomarkers were different at the level of statistical significance between individuals with LSCC and the controls. For NLR, p=0.003; for MLR, p=0.008; for SII, p<0.001. Both NLR and SII were different at a statistically significant level when compared at early and advanced stages of LSCC (p values were 0.011 and <0.001, respectively. MLR did not differ at the level of statistical significance (p=0.944). (See Table 3). Conclusion: SII is straightforward to calculate, economical and reproducible from FBC results. It can provide important clues to the likelihood of perineural or lymphatic involvement in cases of LSCC.Publication Metadata only Burun ameliyatı olmuş hastada komplikasyon değerlendirilmesi(2023-04-01) OYSU, ÇAĞATAY; KUCUR, CÜNEYT; Oysu Ç., Kucur C.Publication Metadata only Diagnostic Features and Risk Factors for Childhood Thyroid Cancers(2022-09-01) ŞAHİN, PINAR; GÜRPINAR TOSUN, BUŞRA; YUMUŞAKHUYLU, ALİ CEMAL; GÜRAN, TÜLAY; HALİLOĞLU, BELMA; OYSU, ÇAĞATAY; DEMİRCİOĞLU, SERAP; BEREKET, ABDULLAH; ŞAHİN P., GÜRPINAR TOSUN B., YUMUŞAKHUYLU A. C. , GÜRAN T., Helvacioglu D., Abali Z. Y. , HALİLOĞLU B., OYSU Ç., BEREKET A., DEMİRCİOĞLU S.Publication Metadata only Comparison of Voice Quality of Life in Early Stage Glottic Carcinoma Treated with Endoscopic Cordectomy Using Radiofrequency Microdissection Electrodes, Laser Cordectomy, and Radiotherapy(MOSBY-ELSEVIER, 2021) BİNNETOĞLU, ADEM; Demir, Berat; Binnetoglu, Adem; Gurol, Ece; Oysu, CagatayPurpose. To compare the quality of life of patients with early glottic carcinoma who have been treated using three treatment modalities: endoscopic cordectomy using radiofrequency microdissection electrodes (ECRM), transoral laser cordectomy, and radiotherapy (RT). ECRM, transoral laser cordectomy, and RT can all be used as alternatives to invasive open surgery to treat the early stages of glottic cancer such as stage T1. Patients treated using these different modalities could have different outcomes with respect to voice quality of life. Materials and Methods. The voice quality of life was measured in patients who underwent ECRM, transoral diode laser excision, or RT for early laryngeal cancer. Post-treatment quality of voice was assessed using the Turkish version of the Voice-Related Quality of Life questionnaire in all patients after 1 year of cancer-free survival. A comparison was then made between the outcomes of the three groups. Results. The total score of the ECRM group, when compared independently to that of the laser and the RT groups, was found to be statistically higher in both cases. However, no statistically significant differences were found between laser and RT groups in terms of any parameters. There was a statistically significant difference between the RT group and the other groups in terms of percentage jitter, percentage shimmer, and fundamental frequency (F0) (P < 0.05). While the RT group had the longest maximum phonation time (P < 0.001), no significant differences were found between the maximum phonation time of the ECRM and the laser groups (P < 0.001). Conclusions. Overall, the worst outcome with respect to voice quality of life is seen with ECRM. Since there were no significant differences in quality of life between the other two treatment modalities, it is recommended to leave the choice between RT and laser surgery up to the patient.Publication Metadata only Laryngeal Framework Surgical Anatomy: A Radiological Study(Mosby Inc., 2021) GÜNDOĞMUŞ, CEMAL AYDIN; Şahin A., Gündoğmuş C.A., Üçkuyulu E.İ., Oysu Ç., Enver N.Purpose: Awareness of variations in laryngeal anatomy among different age and gender groups is crucial during laryngeal framework surgery. The aim of this study is to demonstrate the relationship between gender and laryngeal radiologic morphometrics among different age groups and the applicability of important anatomical landmarks of laryngeal surgery. Methods: Laryngeal images of 180 adult patients older than 18 years of age were obtained by computed tomography and assessed. A total of 11 measurements of important laryngeal landmarks were taken from the patients’ computed tomography images. Results were subgrouped according to gender and age, and these groups were compared for each measurement. Results: The majority of laryngeal measurements obtained in the study were higher in males than females, with the exception of the interlaminar angle. The mean interlaminar angle value was 88.27°± 14.99 for males and 103.04°± 14.81 for females (P <0.005). The distance from the anterior commissure to the inferior border of the thyroid cartilage was 10.46 ± 2.5 mm for males and 7.72 ± 1.9 mm for females. The anterior commissure locates slightly higher than the midpoint of the distance from the thyroid notch to the thyroid inferior border. The shortest distance between the muscular process of the arytenoid cartilage and the thyroid cartilage was found to be 9.60 ± 3.47 mm for males and 7.72 ± 2.33 mm for females (P <0.001). Conclusion: Observation of obvious diversities in the size and distance of the important laryngeal structures between the gender groups is an important factor to be considered for successful laryngeal framework surgery. Also, using the midpoint of the thyroid cartilage as a landmark for anterior commissure is a practical method during surgery, especially for thyroplasty. © 2021 The Voice FoundationPublication Metadata only The Effect of Passive Smoking on Mucociliary Clearance and Inferior Concha Reactivity(SAGE PUBLICATIONS INC, 2021) OYSU, ÇAĞATAY; Kilic, Osman; Yilmaz, Asli Sahin; Oysu, CagatayIntroduction The aim of this study is to investigate the effect of cigarette smoke on turbinate reactivity and mucociliary clearance (MCC) in passive smokers. Methods 60 adult patients (30 passive smokers and 30 healthy subjects as the control group) were recruited for this study. Following a questionnaire on passive smoke exposure, MCC measurement using the saccharin test was carried out to all participants. The baseline and after decongestant acoustic rhinometry values (MCA1, MCA2, VOL1, VOL2) were measured and the percentage changes between the two test values (ie; response to nasal decongestants = concha reactivity) were recorded. Results All 60 patients, including 37 women (61.7%) and 23 men (38.3%) were between 18-57 years of age . MCC's average measurements were 11.13 minutes in the passive smokers group, 7.87 minutes in the control group, which was statistically significantly different (p < 0.05). There was a statistically significant difference between the passive smokers and control group for acoustic rhinometric measurement of the ratio of MCA2 and VOL2 values before and after decongestant application (p < 0.05). Discussion Passive smoking can damage the nasal mucosa at least as active smoking. The number of studies on this subject is limited. There are no studies in the literature showing the effect of cigarette smoke on the inferior turbinate mucosal response. In our study, the inferior turbinate decongestant capacity was found to be significantly decreased in the passive smokers compared to the control group. Conclusion As a result of cigarette exposure, the erectile function of the lower turbines may be impaired. The task of the ENT physicians is to warn the passive smokers in this regard.Publication Metadata only The Sonographic Findings of Papillary Thyroid Microcarcinomas(SAGE PUBLICATIONS INC, 2019) OYSU, ÇAĞATAY; Semiz-Oysu, Aslihan; Demir, Mustafa; Kulali, Fatma; Bukte, Yasar; Oysu, CagatayThe purpose of this research was to compare the sonographic features of papillary thyroid microcarcinomas (micro-PTCs) to those of macro-PTCs. Patients with known PTC were retrospectively reviewed and divided into micro- or macro-PTC groups, according to the largest nodule diameter, <= 10 mm or >10 mm, respectively. Eighty-nine nodules (62 macro-PTCs and 27 micro-PTCs) were evaluated. Contour irregularity was more common in micro-PTCs than macro-PTCs (P < .05). No significant difference was found in the presence of hypoechogenicity, heterogeneity, microcalcifications, cystic component, and absence of peripheral halo between groups (P > .05). Internal vascularity was detected in none of the micro-PTCs while being present in 13% of macro-PTCs (P < .05). Micro-PTCs demonstrated similar sonographic findings as larger PTCs. In micro-PTCs, the presence of irregular contours, in a micro-nodule, should increase suspicion and consideration for biopsy, when clinically indicated. Internal nodular vascularity may not be present in micro-PTCs and therefore not decrease the suspicion of malignancy in the presence of other suspicious sonographic features.Publication Metadata only Use of MRI for detecting the best method of topical nasal drug delivery(2017-10-07) SEMİZ OYSU, ASLIHAN; OYSU, ÇAĞATAY; ŞAHİN ÖNDER S., ÇAYPINAR B., SEMİZ OYSU A., ŞAHİN YILMAZ A., OYSU Ç.Publication Metadata only Laryngeal inflammatory myofibroblastic tumor mimicking advanced stage malignancy(2020-01-01) ENVER, NECATİ; CİNEL, ZELİHA LEYLA; OYSU, ÇAĞATAY; Gönen A., ENVER N., İŞGÖR İ. Ş. , CİNEL Z. L. , OYSU Ç.