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Featured researches published by Sema Koc.


American Journal of Rhinology & Allergy | 2011

The effectiveness of steroids for edema, ecchymosis, and intraoperative bleeding in rhinoplasty.

Sema Koc; Levent Gürbüzler; Huseyin Yaman; Ahmet Eyibilen; Mustafa Süren; Ziya Kaya; Kursat Yelken; İbrahim Aladağ

Background The aim of this study was to investigate the dose-related effectiveness of steroids on periorbital edema, ecchymosis, and intraoperative bleeding in patients who underwent open rhinoplasty with osteotomy. Methods Forty patients were divided into three groups: those in group 1 (n = 15) were given a single dose of 1-mg/kg intravenous (i.v.) methylprednisolone, those in group 2 (n = 15) were given a single dose of 3-mg/kg i.v. methylprednisolone preoperatively, and group 3 (n = 10) was the control group. Eyelid edema and periorbital soft-tissue ecchymosis were evaluated separately using a scale of 0–4. Results In groups using the steroid preoperatively, periorbital edema and ecchymosis were significantly lower compared with the control group (p < 0.05). No significant differences were seen clinically or statistically in preventing or reducing either the periorbital ecchymosis or the periorbital edema between groups 1 and 2. Also, there was no significant difference among the groups in terms of bleeding (p > 0.05). No complications with regard to the operation or steroid use were observed. Conclusion Our results support that steroids significantly decrease periorbital ecchymosis and periorbital edema in open rhinoplasty with osteotomy. Additionally, our results suggest that if the dose of steroids is adjusted according to body weight, there is no significant benefit in a single dose of 3 mg/kg of methylprednisolone over a lower dose of 1 mg/kg and there is no need for higher doses of methylprednisolone administration.


International Journal of Pediatric Otorhinolaryngology | 2012

The effect of adenotonsillectomy on right ventricle function and pulmonary artery pressure in children with adenotonsillar hypertrophy

Sema Koc; Metin Aytekin; Nihat Kalay; Mustafa Ozcetin; Turgay Burucu; Kerem Özbek; Atac Celik; Hasan Kadi; Sefa Gulturk; Fatih Koc

OBJECTIVES Adenotonsillar hypertrophy (ATH) is the most common cause of upper airway obstruction in children. Severe upper airway obstruction may have an effect on chronic alveolar hypoventilation, which consequently may lead to right ventricle (RV) dysfunction induced by hypoxemic pulmonary vasoconstriction. The investigators aimed to study RV function and mean pulmonary artery pressure (mPAP) in patients with ATH who were undergoing adenotonsillectomy by using tissue Doppler echocardiography (TDE). METHODS The study examined 27 children with ATH who had a mean age of 8 ± 2 years. The subjects were comprised 17 (63%) males and 10 (37%) females. Hypertrophy of the tonsils was graded according to the Brodsky scale. Children having either grade 3 or 4 hypertrophied adenotonsils were recruited for the study. Adenotonsillectomy was performed on all subjects in the study group and echocardiographic examination was repeated 3 months postoperatively. RESULTS Tricuspid Em significantly increased after adenotonsillectomy (17.7 ± 3.6 vs. 19.1 ± 5.5, p=0.04). The RV myocardial performance index (MPI) and mPAP significantly decreased after adenotonsillectomy (RV MPI: 0.57 ± 0.13 vs. 0.40 ± 0.12, p<0.001 and mPAP (mmHg): 31 ± 9 vs. 25 ± 7, p=0.001). CONCLUSION The results of this study, evaluated with the results of previous studies, demonstrated that adenotonsillectomy improved RV performance and reduced mPAP in children with ATH.


International Journal of Pediatric Otorhinolaryngology | 2011

Paraoxonase and arylesterase activity and total oxidative/anti-oxidative status in patients with chronic adenotonsillitis

Sema Koc; Nurten Aksoy; Hasan Bilinc; Fazilet Duygu; İsmail Önder Uysal; Adnan Ekinci

OBJECTIVES The aim of this study was to investigate serum paraoxonase, arylesterase activities along with determination of oxidative status via measurement of total oxidant status (TOS), total antioxidant status (TAS) and oxidative stress index (OSI) in children with recurrent adenotonsillitis during pre- and post-adenotonsillectomy period and to compare results with data from healthy subjects. METHODS We performed a prospective controlled trial on adenoidectomy and/or tonsillectomy patients. A total of 47 subjects, including 22 patients with recurrent adenotonsillitis and 25 healthy controls were enrolled in this study. Peripheral venous blood samples were taken from patients before adenotonsillectomy and a second sample was obtained in first month postoperatively. In the control group, blood samples from healthy volunteers were collected for one time only. Serum paraoxonase, arylesterase activities, TOS, TAS and OSI levels were measured. RESULTS Paraoxonase, arylesterase activity, TAS and TOS levels were significantly higher in preoperative group compared to control group (P<0.001, P=0.003, 0.003 and 0.005, respectively). However, OSI level was similar in preoperative group compared to control group (P=0.25). In the post-operative group, paraoxonase, arylesterase activities, TAS and OSI levels were lower as compared to preoperative group but differences were statistically insignificant (P=0.483, 0.265, 0.149 and 0.090, respectively). TOS level in post-operative group was significantly lower than the preoperative group (P<0.001). In the post-operative group, paraoxonase and arylesterase activities were significantly higher as compared to control group (P=0.004 and 0.02, respectively). TOS and OSI levels were significantly lower in post-operative group compared to control group (P=0.001 and 0.02, respectively). However, TAS was similar between post-operative and control groups (P=0.464). CONCLUSIONS Based on data obtained from this study, we may state that paraoxonase, arylesterase activities with TAS, TOS and OSI levels of patients with chronic adenotonsillitis shows alterations due to oxidant/antioxidant imbalance induced by frequent infections.


International Journal of Pediatric Otorhinolaryngology | 2011

The comparison of bacteremia and amount of bleeding during adenotonsillectomy

Sema Koc; Levent Gürbüzler; Gülgün Yenişehirli; Ahmet Eyibilen; İbrahim Aladağ; Kursat Yelken; Hatice Asan

OBJECTIVE Adenoidectomies and/or tonsillectomies are among the most frequently performed otolaryngological surgical procedures.The goals of this study were to investigate the relationship between the amount of bleeding and bacteremia during adenoidectomy and/or tonsillectomy procedures. METHODS Seventy-eight patients who underwent tonsillectomy with or without adenoidectomy and adenoidectomy with or without tube insertion were included in the study. Patients with severe chronic underlying diseases (including cardiovascular disorders, renal or hepatic disease, or immunodeficiency) were excluded from study, as were those who had suffered an acute episode of respiratory infection or had received antibiotics for any reason within three weeks prior to the operation. The amount of bleeding was measured and recorded for each patient during the surgery. Preoperative blood cultures immediately after the induction of anesthesia and postoperative blood cultures 20 min after the operation were collected. RESULTS While none of the blood cultures taken preoperatively was positive for any organisms, the cultures obtained postoperatively were positive in 16 (20.5%) of 78 patients who underwent tonsillectomy with or without adenoidectomy and adenoidectomy with or without tube insertion, and bacteremia was more frequent among those with greater amount of bleeding during the surgery. CONCLUSION The results of this study suggest that although bacteremia had no clinical consequences in patients, it should be kept in mind that patients with greater amount of bleeding are at higher risk for developing bacteremia and it may produce vital results in patients at risk.


International Journal of Pediatric Otorhinolaryngology | 2012

Evaluation of cochlear function using transient evoked otoacoustic emission in children with Familial Mediterranean Fever

İsmail Önder Uysal; Levent Gürbüzler; Ali Kaya; Sema Koc; Sefa Gulturk; Ömer Cevit; Suphi Müderris

OBJECTIVE The aim of this study was to investigate cochlear functions in children with Familial Mediterranean Fever (FMF). METHODS Fifty-six FMF patients (112 ears) and 30 healthy control subjects (60 ears) were included in the study. Transient evoked otoacoustic emission (TEOAE) was investigated. Numerical measurements of TEOAE, except the correlation percentage (%), included response amplitude (dB) and signal/noise (SN) ratio. RESULTS There was no statistically significant difference in age and sex in the two groups. Mean TEOAE correlation percentage, signal/noise ratio, TEOAE amplitudes in 1, 1.5, 2, 3 and 4 Hz frequency values were not different between the two groups (p>0.05). CONCLUSIONS In this study using the TEOAE test, we found that FMF did not cause outer cell hair damage in children. In the literature, there is no study on outer cell hair damage in children or adults with FMF, so this is the first investigational study.


Acta Histochemica | 2012

Jab1 expression is associated with TGF-β1 signaling in chronic rhinosinusitis and nasal polyposis

Sevil Cayli; Ahmet Eyibilen; Levent Gürbüzler; Sema Koc; Gulsen Arslan Atay; Adnan Ekici; İbrahim Aladağ

Jab1, which is a fifth component of COP9 signalosome, plays an essential role in cell growth and proliferation. Jab1 is also shown to regulate transforming growth factor-beta (TGF-β) signaling in carcinoma cells. The aim of the present study was to investigate the expression and the correlation of Jab1 and TGF-β1 in chronic rhinosinusitis and nasal polyposis. Here, we show the elevated expression of Jab1 and TGF-β1 in diseased mucosa without nasal polyps and a correlation between Jab1 and TGF-β1 expression. Forty-six samples (26 patients with nasal polyps, 10 patients with chronic rhinosinusitis and 10 control subjects) were included to this study. Immunohistochemistry and Western blotting were performed for the assessment of Jab1 and TGF-β1 localization and the expression of proteins. Double staining of both proteins showed that Jab1 and TGF-β1 were colocalized in the epithelium, inflammatory cells and the vascular endothelium of nasal mucosa. There was a significant increase in the expression of TGF-β1 and Jab1 in patients without nasal polyps and a significant decrease in patients with nasal polyps compared to controls. Moreover, correlation was detected between the expression of Jab1 and TGF-β1 in chronic rhinosinusitis and nasal polyposis. Our results demonstrate that chronic rhinosinusitis is characterized by elevated expression of Jab1 and TGF-β1 compared to nasal polyposis and Jab1 may play a vital role in the pathogenesis of both chronic rhinosinusitis and nasal polyposis.


International Journal of Pediatric Otorhinolaryngology | 2012

Manganese-superoxide dismutase and glutathione peroxidase 1 polymorphisms in recurrent tonsillitis and tonsillar hypertrophy

Levent Gürbüzler; Erkan Sogut; Sema Koc; Ahmet Eyibilen; Kursat Yelken; Hilmi A. Senkal; Ceyhun Aksakal

OBJECTIVES To investigate the association of manganese-superoxide dismutase and glutathione peroxidase 1 polymorphisms with susceptibility to recurrent tonsillitis and tonsillar hypertrophy. METHODS The study consisted of 103 patients with recurrent tonsillitis, 105 patients with tonsillar hypertrophy and 106 control subjects with similar age and sex. Genomic DNA was extracted from peripheral leukocytes of whole blood which were obtained from all patients and control subjects. Genotyping was performed to identify MnSOD Ala-9Val and GPx1 Pro198Leu polymorphisms by a method based on PCR amplification and detection of polymorphisms with hybridization probes labeled with fluorescent dyes. Genotype and allele frequencies were compared between patients with recurrent tonsillitis and tonsillar hypertrophy and 106 healthy control subjects. RESULTS The genotype distribution of the MnSOD Ala-9Val single nucleotide polymorphism was significantly different for the controls and the recurrent tonsillitis patients (P=0.009). Whereas, no significant difference was found between the patients with tonsillar hypertrophy and the control group (P=0.369). The frequency of the MnSOD CC genotype was lower, and that of the T allele was significantly higher, in recurrent tonsillitis patients than in control subjects. In addition, the frequency of tonsillitis was significantly higher in recurrent tonsillitis patients with the MnSOD Ala-9Val polymorphism than the patients with wild-type (P=0.008). Also, no significant difference was found between patient groups and control subjects in the distribution of the genotype and allele frequency of the GPx1 Pro198Leu single nucleotide polymorphism. CONCLUSIONS The MnSOD Ala-9Val polymorphism causes susceptibility to recurrent tonsillitis in Turkish children. And we suggest that there may be a possible relation between local and recurrent infections or inflammation of the tonsillar tissue and the MnSOD Ala-9Val single nucleotide polymorphism in pediatric patients with RT.


Journal of Laryngology and Otology | 2012

Tularaemia presenting as parapharyngeal abscess: case presentation.

Sema Koc; Levent Gürbüzler; Huseyin Yaman; Ahmet Eyibilen; Salman N; Adnan Ekici

OBJECTIVE We report an extremely rare case of the oropharyngeal form of tularaemia, causing a parapharyngeal abscess. CASE REPORT A 48-year-old woman presented with fever, sore throat, breathing difficulty and a right-sided neck swelling. This mass had previously been treated with penicillin without response, and had already been surgically drained once in another hospital. On physical examination, the tonsils were exudative and hypertrophic and the pharynx was hyperaemic. A fluctuant, 4 × 4 cm mass was seen on endoscopic examination, originating from the left parapharyngeal area and protruding towards the pyriform sinus, and partly obstructing the airway. Microagglutination test antibody titres for Francisella tularensis were positive (1/1280). The patient healed completely after definitive drainage of the abscess and antimicrobial therapy for 14 days (streptomycin, 2 × 1 g intramuscularly). CONCLUSION Tularaemia should be considered in the differential diagnosis of patients presenting with tonsillopharyngitis, cervical lymphadenitis and parapharyngeal abscess who do not respond to treatment with penicillin, even if they do not live in an endemic region.


Acta Cytologica | 2014

Tularemia in Differential Diagnosis of Cervical Lymphadenopathy: Cytologic Features of Tularemia Lymphadenitis

Fatma Markoc; Reşid Doğan Köseoğlu; Sema Koc; Levent Gürbüzler

Objective: Tularemia can cause cervical lymphadenopathy. Fine-needle aspiration (FNA) cytology is the first step in the workup for cervical lymphadenopathy; however, little has been published regarding the cytomorphological features of tularemia lymphadenitis. The aim of this study was to evaluate the FNA cytology of tularemia lymphadenitis. Study Design: Review of medical records identified 36 patients with serologically proven tularemia, and who had undergone lymph node FNA. In each case, the original May-Grünwald-Giemsa-stained FNA smears from enlarged cervical lymph node were reevaluated. Results: Suppuration and cytolysis were frequent cytological findings. Twenty-three (63.8%) of the 36 cases were assessed as suppurative inflammation. In 10 of these cases (27.8% of the total), cytolysis was prominent. In 7 cases (19.4%) the smears featured microgranulomas as well as suppuration, and 2 of these (5.6%) also featured giant cells. In 1 case (2.8%), there was caseous necrosis. In 2 cases (5.6%), the cytopathological findings were consistent with reactive lymphoid hyperplasia. Three aspirates (8.3%) were inadequate for evaluation. Conclusion: Cytopathological findings on FNA of tularemia lymphadenitis are nonspecific; however, in regions where tularemia is endemic, this disease should be considered in the differential diagnosis for suppurative lymphadenitis.


Çağdaş Tıp Dergisi | 2011

Tiroglossal Duktus Kist ve Fistülleri: 44 Olgunun Retrospektif Analizi

Sema Koc; İsmail Önder Uysal; Levent Gürbüzler; İbrahim Aladağ; Ahmet Eyibilen; Ceyhun Aksakal

Introduction: The purpose of this study is to discuss clinical properties, diagnosis and treatment of patients, who were operated due to thyroglossal duct cyst (TDC), in the light of relevant studies in the literature. Instruments and Methods Files of 44 patients, diagnosed with TDC in our clinic, were retrospectively investigated. Information on their age, their gender, their clinical properties, location of the lesion, whether or not it is fistulized, imaging methods required during pre-operative period, treatment way, post-operative recurrence and complications and histopathological diagnosis were registered. Results 15 (34%) women and 29 (66%) men were included in the study. The age is between 5 and 72 and average age is 24±18. All the patients had neck midline complaints. All the patients underwent Sistrunk operation. Only 3 (0.7%) patients had postoperative infection. In accordance with histopathological results, 42 (95%) patients had thyroglossal cyst and 2 patients (5%) had papillary carcinoma. No recurrence was observed for all the patients at the end of 18-month follow-up period. Conclusion: During differential diagnosis of midline neck masses, thyroglossal duct cysts should be considered. For the treatment of the disease, the Sistrunk operation is a gold standard. Thanks to early diagnosis and treatment, having a successful operation and decreasing the risk of developing complication should not be forgotten.

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Ahmet Eyibilen

Gaziosmanpaşa University

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Ceyhun Aksakal

Gaziosmanpaşa University

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Fazilet Duygu

Gaziosmanpaşa University

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Adnan Ekici

Gaziosmanpaşa University

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Kursat Yelken

Gaziosmanpaşa University

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Adnan Ekinci

Gaziosmanpaşa University

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