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Dive into the research topics where Bülent Köstü is active.

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Featured researches published by Bülent Köstü.


European Journal of Obstetrics & Gynecology and Reproductive Biology | 2011

Modified Ferriman–Gallwey hirsutism score and androgen levels in Turkish women

Ayhan Coskun; Önder Ercan; Deniz Cemgil Arikan; Ali Ozer; Metin Kilinc; Gurkan Kiran; Bülent Köstü

OBJECTIVE(S) To evaluate a modified Ferriman-Gallwey (mFG) scoring system and serum total testosterone (tT) and dehydroepiandrosterone sulfate (DHEAS) levels, in women with polycystic ovary syndrome (PCOS) and in control subjects. STUDY DESIGN Women with any gynecological problem who presented to the Kahramanmaras Sutcuimam University Medical Faculty Gynecology and Obstetric Outpatient Clinic in the Mediterranean region of Turkey were assessed prospectively. Oligo-anovulation, clinical and biochemical hyperandrogenism, and PCO appearance on ultrasound that met the 2003 Rotterdam Consensus Criteria were used for PCOS diagnosis. Group 1 consisted of 43 cases with a diagnosis of PCOS and group 2 (control group) consisted of 75 age and BMI matched control subjects without PCOS. RESULTS In groups 1 and 2, clinical hyperandrogenism (hirsutism) appearance ratio was 86.0% (37/43) and 18.0% (15/75) (p < 0.001); while biochemical hyperandrogenism (high serum tT or DHEAS level) was 65.1% (28/43) and 36% (27/75) (p < 0.05), respectively. In groups 1 and 2, mean serum tT levels were 115.2 and 73.4 ng/dL (p < 0.001), mean serum DHEAS levels were 256.1 and 177.7 ng/dL (p < 0.001), and mean hirsutism scores were 11.2 and 5.5 (p < 0.001), respectively. Serum mean tT, DHEAS and hirsutism scores for group 1 were significantly higher than those of group 2 (<0.001). No correlation was observed between BMI and the hirsutism scores or the biochemical hyperandrogenism in both groups. CONCLUSION(S) In our study, mean serum androgen levels and hirsutism ratio in the PCOS group were higher than the control group. These values were also substantially higher than those previously published in the literature.


Medical Science Monitor | 2015

Changes in Copper, Zinc, and Malondialdehyde Levels and Superoxide Dismutase Activities in Pre-Eclamptic Pregnancies.

Murat Bakacak; Metin Kilinc; Salih Serin; Önder Ercan; Bülent Köstü; Fazıl Avcı; Hakan Kiran; Gurkan Kiran

Background Preeclampsia (PE) is a hypertensive disorder that occurs in 2% to 8% of pregnancies. Although numerous studies have investigated the etiology and pathophysiology of preeclampsia, the precise pathological mechanisms remain poorly understood. Hence, in the present study malondialdehyde (MDA) levels and SOD expression, and Cu and Zn concentrations and ratios were correlated with birth weights in pregnant women with and without PE, and in non-pregnant females of reproductive age. Material/Methods Malondialdehyde (MDA) levels and superoxide dismutase (SOD) activities were determined spectrophotometrically, and Cu and Zn levels were determined using atomic absorption spectrometry in serum from 42 non-pregnant women (NP), 40 healthy pregnant women (HP), and 38 pre-eclamptic pregnant (PE) women. Subsequently, Cu/Zn ratios were calculated and associations with birth weights were analyzed using Spearman correlations. Results Cu, Zn, and MDA levels and Cu/Zn ratios were significantly higher in the PE group than in the HP and NP groups, and were significantly higher in the HP than in the NP group (p<0.001 and p<0.001; respectively). In contrast, serum Zn and SOD levels were significantly lower in the PE group than in HP and NP groups, and were significantly lower in the HP group than in the NP group (p<0.001 and p<0.001; respectively). However, only Cu and Zn levels were significantly associated with fetal birth weights (r=−0.433, p<0.001). Conclusions Serum Cu/Zn ratios may reflect vascular complications of PE, and the ensuing increases in lipid peroxidation may play important pathogenic roles.


International Journal of Gynecology & Obstetrics | 2005

Systemic medical management of ovarian pregnancy

Gurkan Kiran; Alanur M. Guven; Bülent Köstü

Ovarian pregnancy is a rare form of ectopic implantation. Because of current availability of early diagnosis for ectopic pregnancy medical treatment may be an important alternative to surgical therapy. Stovall stated that medical management should be routinely used as primary therapy for ectopic pregnancy. There are many series in the literature reporting successful conservative management of ectopic pregnancy especially in tubal form. However reports on medical management of ovarian ectopic pregnancy are very rare. (excerpt)


Case Reports in Medicine | 2011

Vulvar Pyogenic Granuloma in a Postmenopausal Woman: Case Report and Review of the Literature

Deniz Cemgil Arikan; Gurkan Kiran; Hamide Sayar; Bülent Köstü; Ayhan Coskun; Hakan Kiran

Introduction. Although pyogenic granulomas (PG) are common and benign vascular proliferations of the skin and mucous membranes, they are relatively rare on the vulva. Case Presentation. A 57-year-old G7P7 postmenopausal woman presented with a 3-year history of a foul smell and bleeding lesions in the genital region. A gynecologic examination revealed multiple large papillomatous, pedunculated, and lobulated lesions that were cherry-red and infective in appearance. There was a 2-cm lesion at the upper intersection of the labia majora, a 2-cm lesion on the right labium majus, and a 4-cm lesion on the clitoris. The patient complained of itching, and the lesions were asymptomatic, except for occasional bleeding. All lesions were excised and sent for histopathological examination, which revealed an ulcerated polypoidal structure with extensive proliferation of vascular channels lined by a single layer of endothelium. The histopathological features were consistent with PG. Conclusion. The present case is the first case of multiple pyogenic granulomas on the vulva in a postmenopausal woman.


Pregnancy Hypertension: An International Journal of Women's Cardiovascular Health | 2016

Is neutrophil/lymphocyte ratio a useful marker to predict the severity of pre-eclampsia?

Salih Serin; Fazıl Avcı; Önder Ercan; Bülent Köstü; Murat Bakacak; Hakan Kiran

OBJECTIVE To evaluate the relationship of neutrophil/lymphocyte ratio (NLR) with proteinuria and blood pressure level in patients with pre-eclampsia and to investigate whether or not NLR has a role in predicting the severity of pre-eclampsia. STUDY DESIGN The study comprised 30 healthy pregnant females (Group 1), 37 females with mild pre-eclampsia (Group 2) and 40 with severe pre-eclampsia (Group 3). All the study participants were statistically compared in respect of demographic data, proteinuria levels, and blood pressure levels. RESULT Age, body mass index, and gestational weeks were similar in all the groups. Maternal NLR was determined to be significantly high in the pre-eclamptic patients (Groups 2 and 3) compared to the healthy pregnant patients (Group 1) (p=0.017). NLR was significantly higher in the severe pre-eclampsia group than in the mild pre-eclampsia group (p=0.032). A significant positive correlation was determined in correlation analysis between NLR and proteinuria (p=0.013, r=0.319). There was also a significant and positive correlation between NLR and systolic/diastolic arterial pressure (p=0.007, r=0.285; p=0.044, r=0.213, respectively). CONCLUSION In conclusion, while NLR was determined as significantly high in patients with pre-eclampsia, to be able to use this in the classification of the severity of pre-eclampsia, there is a need for further studies on a more extensive population.


International Journal of Gynecology & Obstetrics | 2016

Comparison of postoperative vaginal length and sexual function after abdominal, vaginal, and laparoscopic hysterectomy

Önder Ercan; Alev Özer; Bülent Köstü; Murat Bakacak; Gurkan Kiran; Fazıl Avcı

To compare vaginal length and sexual function after total laparoscopic hysterectomy (TLH), total abdominal hysterectomy (TAH), and vaginal hysterectomy (VH).


Journal of The Turkish German Gynecological Association | 2016

Utility of preoperative neutrophil-to-lymphocyte and platelet-to-lymphocyte ratios to distinguish malignant from benign ovarian masses

Murat Bakacak; Salih Serin; Önder Ercan; Bülent Köstü; Mehmet Sühha Bostancı; Zeyneb Bakacak; Hakan Kiran; Gurkan Kiran

OBJECTIVE We aimed to investigate the utility of preoperative neutrophil-to-lymphocyte ratio (NLR), platelet-to-lymphocyte ratio (PLR), and lymphocyte count as biomarkers to distinguish malignant from benign ovarian masses. MATERIAL AND METHODS We retrospectively reviewed the histopathological results of 185 benign and 33 malignant cases following surgery for an initial diagnosis of adnexal mass and confirmed ovarian masses. Age, cancer antigen 125 (CA-125), white blood cell (WBC) count, hemoglobin (Hb), hematocrit (Hct), mean platelet volume (MPV), platelet distribution width (PDW), NLR, PLR, and lymphocyte counts were compared between groups. RESULTS The significant diagnostic factors to distinguish malignant from benign disease were age (35.5±22 vs. 62±13 years; p<0.001) and CA-125 levels (16.6±21 vs. 98±366 U/mL; p<0.001). No significant difference was observed in WBC count, Hct, Hb, platelet count, PDW, and MPV between groups. To distinguish malignant from benign masses, lymphocyte count (1.29±0.91 vs. 1.80±0.67×10(3) cells/μL, p<0.001), NLR (4.95±5.36 vs. 3.32±2.72, p=0.024), and PLR (203.41±107.84 vs. 160.75±70.84, p<0.001) were identified as markers. The cutoff values were lymphocyte count of >1500 cells/μL (p<0.001), NLR of 3.4732 (p=0.033), PLR of 161.13 (p<0.001), CA-125 of >40 U/mL (p<0.001), and age of >53 years (p<0.001); their respective sensitivity and specificity were 66.7% and 77.8% [area under the curve (AUC), 0.723±0.055], 68.8% and 54.1% (AUC, 0.624±0.058), 81.8% and 50.8% (AUC, 0.683±0.052), 78.8% and 77.8% (AUC, 0.797±0.057), and 81.8% and 82.2% (AUC, 0.888±0.025). Multiple logistic regression analysis revealed cutoff explanatory and accuracy values of 68.2% and 94.9%, respectively, for lymphocyte count, NLR, PLR, CA-125, and age as independent parameters to distinguish malignant from benign ovarian masses. CONCLUSION In combination with age and CA-125 levels, NLR, PLR, and lymphocyte count may be helpful to preoperatively distinguish malignant from benign ovarian masses.


Journal of Maternal-fetal & Neonatal Medicine | 2016

The evaluation of Nesfatin-1 levels in patients with and without intrauterine growth restriction

Salih Serin; Murat Bakacak; Önder Ercan; Bülent Köstü; Fazıl Avcı; Deniz Cemgil Arikan; Gurkan Kiran

Abstract Objective: To evaluate Nesfatin-1 levels in patients with and without intrauterine growth restriction and to analyze the correlation between Nesfatin-1 levels and fetal birth weights. Methods: This study comprised a total of 81 cases; 41 patients with IUGR and 40 healthy cases. Demographic data, pregnancy weeks, fetal birth weights and Nesfatin-1 levels were all recorded. The Nesfatin-1 levels were compared between the groups and the correlation between fetal birth weights and Nesfatin-1 levels was analyzed. Results: No statistical significant difference was determined between the groups in terms of demographic data (p > 0.05). Average birth weights were determined as 3420 ± 259 g in the control group and 2041 ± 350 g in the IUGR group, which was found to be statistically unequal (p = 0.001). The average Nesfatin levels in the control group were 0.069 ± 0.011 and 0.094 ± 0.042 in the IUGR group. This difference was statistically unequal (p = 0.001). While no correlation was determined between Nesfatin levels and fetal birthweights in the control group (r = −0.034 versus p = 0.836), in the IUGR group and when all the cases were evaluated together, a statistically moderately significant negative correlation was determined (r = −0.469, p = 0.002 and r = −0.251, p = 0.024, respectively). Conclusions: Although intrauterine growth is a multifactorial process, the effect mechanism has not yet been established. The results of this study offer some indications about the possible effect of Nesfatin 1 on fetal growth.


Ginekologia Polska | 2016

Increased oxidative stress is associated with insulin resistance and infertility in polycystic ovary syndrome

Alev Özer; Murat Bakacak; Hakan Kıran; Önder Ercan; Bülent Köstü; Mine Kanat-Pektaş; Metin Kilinc; Ferhat Aslan

OBJECTIVES The present study aims to investigate the role of oxidant-antioxidant status in young women with polycystic ovary syndrome (PCOS). MATERIAL AND METHODS Seventy-one women with PCOS and 53 healthy controls are compared in aspect of demographic characteristics, biochemical data, hormones, and oxidant-antioxidant status. RESULTS The PCOS group had significantly lower zinc, higher malondialdehyde and gluthathione peroxidase and lower serum catalase levels than the control group (p = 0.016, p < 0.001, p = 0.043 and p = 0.025 respectively). The PCOS patients with IR had significantly higher malondialdehyde, lower catalase and serum zinc levels than the PCOS patients without IR (p = 0.015, p = 0.010, p = 0.001 respectively). The infertile PCOS patients had significantly higher malondialdehyde, lower catalase and serum zinc levels than the fertile PCOS patients (p = 0.022, p = 0.045,p = 0.001 respectively). There was a statistically significant and positive correlation between HOMA-IR and malondialdehyde values (r = 0.523, p = 0.001), between HOMA-IR and glutathione peroxidase values (r = 0.468, p = 0.001) and between HOMA-IR and zinc values (r = 0.601, p = 0.001). There was a statistically significant and negative correlation between HOMA-IR and catalase values (r = -0.493, p = 0.001). CONCLUSIONS The patients with PCOS are under oxidative stress and this oxidative stress seems to be the highest in patients with IR and with infertility. Despite the prominent increase in the oxidative stress, there was a variation in the antioxidant response.


Saudi Medical Journal | 2015

Comparison of solifenacin and fesoterodine in treatment of overactive bladder

Önder Ercan; Bülent Köstü; Murat Bakacak; Yusuf Aytaç-Tohma; Bora Çoşkun; Fazıl Avcı; Erkan Efe

Objectives: To compare the use of solifenacin and fesoterodine in treatment of overactive bladder (OAB). Methods: This prospective study was conducted on patients diagnosed with OAB who presenting to the Department of Obstetrics and Gynecology and Urology, School of Medicine, Kahramanmaraş Sütçü İmam University, Kahramanmaraş, Turkey between October 2013 and August 2014. Patients were randomized into 2 groups. Group 1 (n=60) received 5 mg solifenacin per day, while Group 2 (n=59) received 4 mg fesoterodine per day. All the patients’ OAB symptom scores (OABSS) in weeks 0, 4, and 12 were recorded. In addition, treatment costs and side effects of the drugs were evaluated. Results: Average OABSS (score 1) was determined as: 9.5 ± 2.8 for Group 1 and 10.7 ± 1.8 for Group 2 at week 0; 2.2 ± 1.2 (Group 1) and 2.4 ± 1.3 (Group 2) at week 4 (score 2); and 1.3 ± 0.5 for Group 1 and 1.3 ± 0.6 for Group 2 at week 12 (score 3). In addition, no statistically significant difference was found between the scores (p=0.062 (score 1), p=0.464 (score 2), and p=0.527 (score 3). The discontinuation rate of medication due to its side effects was 0 (0%) for Group 1, and 6 (10.2%) for Group 2. Intragroup changes in the scores 1-2, 1-3, and 2-3 values was statistically significant in both groups (p<0.001). Conclusion: No significant difference was found between the OABSS of these 2 drugs. However, discontinuation of drugs due to side effects was more frequent in fesoterodine.

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Önder Ercan

Kahramanmaraş Sütçü İmam University

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Murat Bakacak

Kahramanmaraş Sütçü İmam University

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Salih Serin

Kahramanmaraş Sütçü İmam University

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Fazıl Avcı

Kahramanmaraş Sütçü İmam University

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Gurkan Kiran

Kahramanmaraş Sütçü İmam University

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Alev Özer

Kahramanmaraş Sütçü İmam University

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Deniz Cemgil Arikan

Kahramanmaraş Sütçü İmam University

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Hakan Kiran

Kahramanmaraş Sütçü İmam University

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Ayhan Coskun

Kahramanmaraş Sütçü İmam University

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