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Dive into the research topics where Murat Keskin is active.

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Featured researches published by Murat Keskin.


Journal of Bone and Joint Surgery, American Volume | 2005

Metacarpal brown tumor in secondary hyperparathyroidism due to vitamin-D deficiency. A case report.

Erdinc Erturk; Murat Keskin; Canan Ersoy; Tufan Kaleli; Sazi Imamoglu; Gülaydan Filiz

B rown tumors are locally destructive bone lesions caused by rapid osteoclastic bone resorption due to severe hyperparathyroidism1. For years, brown tumors have been considered to be characteristic of primary hyperparathyroidism. However, brown tumors also have been reported to occur in patients with severe hyperparathyroidism secondary to chronic renal failure2-4, especially those on long-term hemo-dialysis. Hypocalcemia, hyperphosphatemia, and vitamin-D deficiency are the basic characteristics of chronic renal failure associated with secondary hyperparathyroidism. Fig. 1 Photograph of the lesion at presentation. The appearance of brown tumor lesions in a patient with secondary hyperparathyroidism due to malabsorption has been reported5; but, to our knowledge, there are no reported cases of a patient in whom brown tumor developed secondary to osteomalacia due to inadequate sunlight exposure and dietary vitamin-D deficiency. Our patient was informed that data concerning the case would be submitted for publication. A twenty-eight-year-old woman who had been in purdah (no skin exposed in public except the hands and face) since she was thirteen years old presented with a 4 × 3-cm painful mass in the region of the fourth metacarpal of the right hand without redness or warmth (Fig. 1). Her hand movement was extremely restricted. Radiographs revealed an expansile lytic lesion …


The Turkish journal of gastroenterology | 2014

The relation between liver histopathology and GGT levels in viral hepatitis: more important in hepatitis B.

Ahmet Tarık Eminler; Kader Irak; Talat Ayyildiz; Murat Keskin; Murat Kiyici; Selim Gurel; Macit Gülten; Enver Dolar; Selim Giray Nak

BACKGROUND/AIMS To investigate the relationship between gamma-glutamyl transpeptidase (GGT) levels and histopathological status determined by biopsy in patients with chronic hepatitis B and C. MATERIALS AND METHODS Patients with chronic hepatitis B and C who were referred to the Uludağ University Faculty of Medicine Gastroenterology outpatient clinic between January 2005-January 2011 and underwent liver biopsy were included in the study. Overall, 246 patients with hepatitis B and 151 patients with hepatitis C were enrolled. According to the evaluation based on the Ishak score, patients with a histological activity index (HAI) between 0-12 were defined as low activity, and those with an HAI between 13-18 were defined as high activity. In addition, patients with a fibrosis score of 0-2 were defined as low fibrosis, and those with a score between 3-6 were defined as high fibrosis; comparisons were made accordingly. RESULTS In patients with hepatitis B, the mean GGT level was 38.86±42.4 (IU/L) in the low activity group and 60.44±44.4 (IU/L) in the high activity group (p<0.05). In hepatitis B patients, the mean GGT level was 26.89±14.83 (IU/L) in the low fibrosis group, whereas it was 65.60±59.7 (IU/L) in the high fibrosis group (p<0.001). There was no significant difference between HAI and fibrosis group with regard to GGT levels in the hepatitis C patients. CONCLUSION In conclusion, it is proposed that in patients with chronic viral hepatitis, GGT levels can be taken into consideration to predict advanced histological liver damage, especially in patients with hepatitis B.


Annals of Nutrition and Metabolism | 2008

Impact of a Basic Nutrition Course for Residents at a Faculty Hospital

Turkay Kirdak; Remzi Iscimen; Burak Tanir; Nermin Kelebek; Murat Keskin; Nusret Korun

Background/Aims: To assess whether a basic nutrition course for residents at a faculty hospital improves their knowledge of nutrition and increases the number of consultation requests for nutrition by alerting participants to the high prevalence of undernutrition in hospitals. Methods: The residents from 34 departments of basic, internal and surgical sciences were recruited to take a 1-day course. Questionnaires, designed to assess knowledge of nutrition, were completed at the beginning and at the end of the course. The results of the questionnaires and the number of consultation demands for nutrition before and after the course were compared. Results: The results of 161 participants were evaluated. The mean (±SE) numbers of correct answers given to the first and second questionnaires were 14.9 ± 0.22 and 18.7 ± 0.21, respectively (p < 0.01). When the number of requests for nutrition consultation during 7-month periods (just before and after the course) were compared, the mean number of requests in each month during these periods were found to be 1.81 ± 0.58 and 4.06 ± 1.20, respectively (p < 0.01). Conclusions: A short course of basic nutrition for residents improves their basic knowledge and leads to an increase in the number of consultation requests for nutritional support.


Blood Coagulation & Fibrinolysis | 2008

Acute myocardial infarction, ischemic cerebrovascular disease and variceal bleeding due to portal vein thrombosis in a patient with hereditary thrombophilia.

Bulent Baran; Yusuf Yilmaz; Oktay Algin; Murat Keskin; Murat Kiyici; Guzin Kocamaz; Enver Dolar

We report on a 43-year-old female patient with multiple thrombotic risk factors who, in a few months, developed acute myocardial infarction, an ischemic cerebrovascular event and variceal bleeding due to portal vein thrombosis. The factor V Leiden mutation was carried in heterozygous form, homocysteine was elevated at 19.6 micromol/l, and methylenetetrahydrofolate reductase C677T mutation was carried in homozygous form. Moderately increased plasma homocysteine level and a reduced protein S activity were evident. Anticardiolipin IgG antibodies were mildly positive. We conclude that the presence of multiple genetic and environmental risk factors greatly amplifies the risk of clinical thrombotic events.


Sakarya Tıp Dergisi | 2015

Sağ Kolon Yerleşimli Adenomlar: High-Grade Displazi veya İnvaziv Kanser için Risk Faktörü

Ahmet Tarık Eminler; Mustafa Ihsan Uslan; Kader Irak; Talat Ayyildiz; Murat Keskin; Murat Kiyici; Selim Gurel; Macit Gülten; Enver Dolar; Selim Giray Nak

Amac: Bu calismanin amaci high-grade displazi (HGD) ve invaziv kanser ( “ilerlemis patoloji (IP)” olarak tanimlanmistir) ile iliskili multipl hasta ve adenom karakterlerini degerlendirmektir. Materyal ve Metod: Toplam 6250 islem sonunda 894 hastada 1379 (% 22.06) polip mevcuttur. Biz patoloji sonuclarina ulasabildigimiz 914 polipi degerlendirmeye aldik. Bulgular: 914 polipte toplam 699 adenom tespit edildi. A total of 699 adenomas were detected from 914 polyps. Sag kolon yerlesimli poliplerde sola gore daha yuksek oranda IP ozellikleri bulundu (% 18.5 vs % 7.1 p: 0.002). Lojistik regresyon analizi sonucunda; erkek cinsiyet, 2 cm’e esit ya da buyuk boyut, villoz histoloji ve non-dimunitif gorunum adenomlardaki IP ozellikleri icin bagimsiz risk faktorleri olarak bulundu. Sonuc: Calismamizda, diger calismalara benzer olarak, erkek cinsiyet, 2 cm’e esit ya da buyuk boyut, villoz histoloji ve non-dimunitif gorunum adenomlardaki IP ozellikleri icin bagimsiz risk faktorleri olarak bulundu. Fakat diger bircok calismanin aksine biz sag kolon yerlesimli poliplerde sol taraf yerlesimli poliplere gore daha yuksek oranda IP ozellikleri bulduk.The long QT syndrome (LQTS) is characterized with arrhythmic attacks, repeating syncopes,seizures, and ventricular arrhythmias leading to sudden death. Arrhythmias with a potential ofmortal course develop due to elongation of ventricular repolarization, either acquired or inborn.Herein the present paper, a case of congenital LQTS, admitted after a sudden cardiac arrest andtotally recovered with implantable cardiac defibrillator (ICD), was focused on


Sakarya Medical Journal | 2014

Right-Sided Adenomas of the Colon: A Risk Factor For High-Grade Dysplasia or Invasive Cancer

Ahmet Tarık Eminler; Mustafa Ihsan Uslan; Kader Irak; Talat Ayyildiz; Murat Keskin; Murat Kiyici; Selim Gurel; Macit Gülten; Enver Dolar; Selim Giray Nak

Amac: Bu calismanin amaci high-grade displazi (HGD) ve invaziv kanser ( “ilerlemis patoloji (IP)” olarak tanimlanmistir) ile iliskili multipl hasta ve adenom karakterlerini degerlendirmektir. Materyal ve Metod: Toplam 6250 islem sonunda 894 hastada 1379 (% 22.06) polip mevcuttur. Biz patoloji sonuclarina ulasabildigimiz 914 polipi degerlendirmeye aldik. Bulgular: 914 polipte toplam 699 adenom tespit edildi. A total of 699 adenomas were detected from 914 polyps. Sag kolon yerlesimli poliplerde sola gore daha yuksek oranda IP ozellikleri bulundu (% 18.5 vs % 7.1 p: 0.002). Lojistik regresyon analizi sonucunda; erkek cinsiyet, 2 cm’e esit ya da buyuk boyut, villoz histoloji ve non-dimunitif gorunum adenomlardaki IP ozellikleri icin bagimsiz risk faktorleri olarak bulundu. Sonuc: Calismamizda, diger calismalara benzer olarak, erkek cinsiyet, 2 cm’e esit ya da buyuk boyut, villoz histoloji ve non-dimunitif gorunum adenomlardaki IP ozellikleri icin bagimsiz risk faktorleri olarak bulundu. Fakat diger bircok calismanin aksine biz sag kolon yerlesimli poliplerde sol taraf yerlesimli poliplere gore daha yuksek oranda IP ozellikleri bulduk.The long QT syndrome (LQTS) is characterized with arrhythmic attacks, repeating syncopes,seizures, and ventricular arrhythmias leading to sudden death. Arrhythmias with a potential ofmortal course develop due to elongation of ventricular repolarization, either acquired or inborn.Herein the present paper, a case of congenital LQTS, admitted after a sudden cardiac arrest andtotally recovered with implantable cardiac defibrillator (ICD), was focused on


World Journal of Gastroenterology | 2007

Soluble forms of extracellular cytokeratin 18 may differentiate simple steatosis from nonalcoholic steatohepatitis

Yusuf Yilmaz; Enver Dolar; Engin Ulukaya; Semra Akgoz; Murat Keskin; Murat Kiyici; Sibel Aker; Arzu Yilmaztepe; Selim Gurel; Macit Gülten; Selim Giray Nak


World Journal of Gastroenterology | 2007

Evaluation of leukocyte esterase and nitrite strip tests to detect spontaneous bacterial peritonitis in cirrhotic patients.

Serkan Torun; Enver Dolar; Yusuf Yilmaz; Murat Keskin; Murat Kiyici; Melda Sinirtas; Emre Sarandol; Selim Gurel; Selim Giray Nak; Macit Gülten


Medical Science Monitor | 2009

Elevated serum levels of caspase-cleaved cytokeratin 18 (CK18-Asp396) in patients with nonalcoholic steatohepatitis and chronic hepatitis C.

Yusuf Yilmaz; Enver Dolar; Engin Ulukaya; Semra Akgoz; Murat Keskin; Murat Kiyici; Omer Yerci; Arzu Yilmaztepe Oral; Cuma Bulent Gul; Selim Gurel; Selim Giray Nak; Macit Gülten


The Turkish journal of gastroenterology | 2011

A case of torsion of the wandering spleen presenting as hypersplenism and gastric fundal varices.

Kader Irak; Irfan Esen; Murat Keskin; Ahmet Tarık Eminler; Talat Ayyildiz; Ekrem Kaya; Murat Kiyici; Selim Gurel; Selim Giray Nak; Macit Gülten; Enver Dolar

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