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Featured researches published by Ozkan Sayan.


Breast Cancer Research | 2003

Breast cancer in association with thyroid disorders

Orhan Türken; Yavuz Narin; Sezai DemIrbas; M Emin Onde; Ozkan Sayan; E. Gokhan Kandemir; Mustafa Yaylaci; Ahmet Öztürk

BackgroundThe relationship between breast cancer and thyroid diseases is controversial. Discrepant results have been reported in the literature. The incidences of autoimmune and nonautoimmune thyroid diseases were investigated in patients with breast cancer and age-matched control individuals without breast or thyroid disease.MethodsClinical and ultrasound evaluation of thyroid gland, determination of serum thyroid hormone and antibody levels, and fine-needle aspiration of thyroid gland were performed in 150 breast cancer patients and 100 control individuals.ResultsThe mean values for anti-thyroid peroxidase antibodies were significantly higher in breast cancer patients than in control individuals (P = 0.030). The incidences of autoimmune and nonautoimmune thyroid diseases were higher in breast cancer patients than in control individuals (38% versus 17%, P = 0.001; 26% versus 9%, P = 0.001, respectively).ConclusionOur results indicate an increased prevalence of autoimmune and nonautoimmune thyroid diseases in breast cancer patients.


Archives of Gerontology and Geriatrics | 2010

Albumin, hemoglobin, body mass index, cognitive and functional performance in elderly persons living in nursing homes

Yalcin Onem; Hakan Terekeci; Yasar Kucukardali; Burak Sahan; Emrullah Solmazgul; Mehmet Güney Şenol; Selim Nalbant; Ozkan Sayan; Cihan Top; Cagatay Oktenli

The aim of this study is to produce the relation between cognitive and functional performance and some biochemical parameters in elderly population. So, we searched for the correlation between the activities of daily living (ADL), mini-mental state examination (MMSE) and body weight, age, hemoglobin, albumin, serum sodium level of 180 elderly people in five nursing homes. Face-to-face interviews and questionnaires were applied to evaluate ADL. To evaluate the cognitive function we used the MMSE. The average age of 180 people contacted was 71.5+/-5.1 (+/-S.D.), ranging 65-91 years; 112 of them were women (62.2%), 68 were men (37.8%). Of these elderly people, 25% had no medically diagnosed illnesses, whereas 17 of them (9.4%) were bedridden. There was a positive correlation between ADL and hemoglobin, albumin, body weight, cognitive function parameters and a negative one with age and serum sodium. There was a positive correlation between cognitive functions and hemoglobin, body weight, ADL and a negative one with serum sodium. Hemoglobin concentrations indicating anemia were observed in 30% of subjects, 3.9% of them had hyponatremia and 26.7% displayed a hypernatremia. There was a positive correlation between cognitive and physical function scores and hemoglobin, albumin levels in elderly patients. These results suggest that restoration of hemoglobin and albumin levels could improve cognitive and physical functional status in the elderly population.


European Journal of Internal Medicine | 2010

Relationship between anaemia and cognitive functions in elderly people

Hakan Terekeci; Yasar Kucukardali; Yalcin Onem; Alev Akyol Erikci; Betul Kucukardali; Burak Sahan; Ozkan Sayan; Serkan Celik; Mahir Güleç; Yavuz S. Sanisoglu; Selim Nalbant; Cihan Top; Cagatay Oktenli

BACKGROUND The primary goal of the present study was to investigate the effects of anaemia on the cognitive functions and daily living activities in elderly people. METHODS This sectional study was performed using 180 elderly people. Face-to-face interviews and questionnaires were conducted to evaluate daily activities. To evaluate cognitive functions we used the Folsteins Mini-Mental State Examination (MMSE). RESULTS The mean age of the anaemic group and the nonanaemic group were 76.0+/-11.7 and 72.5+/-15.2 years, respectively. The average haemoglobin level among the anaemic population was 10.4 g/dL compared with 13.6 g/dL among the nonanaemic population; a statistically significant difference. There was more impairment in functional status (Katz ADL) (6.8+/-4.3 vs 9.3+/-3.7) and cognition (MMSE) (17.9+/-6.4 vs 21.7+/-6.7) in anaemic than nonanaemic groups, respectively. Albumin and body mass index were lower and the percentage of two or more comorbidities was higher in anaemic group compared to the nonanaemic group, which was a statistically significant variation. The anaemic group was more dependent in terms of bathing, dressing, toileting and transferring. CONCLUSION In the elderly anaemic group, the dependency for daily activities that require physical effort was higher compared to the nonanaemic group. The MMSE score in the elderly anaemic group was lower than subjects who had normal haemoglobin levels. We conclude that anaemia may impair cognitive functions and some daily living activities in the elderly.


Acta Haematologica | 2006

The Efficacy of Helicobacter pylori Eradication in the Treatment of Idiopathic Thrombocytopenic Purpura – The First Study in Turkey

Ozkan Sayan; Alev Akyol Erikci; Ahmet Öztürk

medicine department. The overall median age was 52.5 years (range 16–93). The median age of the 20 patients was 50.8 years (range 21–81). Platelet counts ranged between 14 and 87 ! 10 9 /l (median 38.3 ! 10 9 /l). They received antibiotic therapy for H. pylori eradication (amoxicillin 1,000 mg, clarithromycin 500 mg, and lansaprazole 15 mg twice a day for 14 days). Patients were reevaluated 1 month after the eradication therapy by the urea breath test. The platelet count was monitored monthly in the fi rst year and every 2 months thereafter. Response to treatment was defi ned as partial (PR) if the platelet count was between 100 and 150 ! 10 9 /l and complete (CR) if the platelet count was 1 150 ! 10 9 /l. The others were recorded as non responders (NR). H. pylori eradication was achieved in 18/20 cases (90%). Table 1 shows the main features of the patients and the mean follow-up period with preand posttreatment platelet counts. We achieved normal platelet counts in 8/20 cases (40%) in the fi rst month of eradication therapy (fi g. 1, 2). The median platelet count was 39.7 8 19.2 ! 10 9 /l before and 164.2 8 63.2 ! 10 9 /l after eradication, which was statistically meaningful (p ! 0.05). The mean followup period was 13 months. Five out of 8 patients achieved CR. The median platelet count was 193 ! 10 9 /l and Helicobacter pylori is a gram-negative bacterium that is the main cause of gastritis and peptic ulcer disease [1] . It has been implicated in the pathogenesis of some autoimmune diseases, e.g. Sjogren’s syndrome [2] , and recently, in idiopathic thrombocytopenic purpura (ITP). An immunological response to H. pylori infection has been suggested to play a major role in determining gastro-duodenal damage through the production of cytokines and autoantibodies against gastric epithelial cells [3] . There are data consistent with an association between H. pylori infection and a signifi cant increase in platelet count following H.pylori eradication [4] . The aim of this study was to assess the prevalence of H. pylori infection and the effi cacy of eradication therapy in patients with ITP. Between September 2001 and June 2003 we investigated the presence of gastric H. pylori infection in 34 adult ITP patients (12 females, 22 males) consecutively admitted to our hematology department. ITP was diagnosed on the basis of the presence of isolated thrombocytopenia (platelets ! 100 ! 10 9 /l) and megakaryocytic hyperplasia in bone marrow. Other causes of thrombocytopenia (pseudothrombocytopenia, hepatitis C virus infection, human immunodefi ciency virus infection, drugs, and malignancy) were excluded. Twenty out of the 34 prospectively enrolled ITP patients (59%) had documented H. pylori infection by the urea breath test in our nuclear Received: March 21, 2005 Accepted after revision: November 25, 2005


Geriatrics & Gerontology International | 2011

Increased iron and oxidative stress are separately related to cognitive decline in elderly.

Elcin Erkuvan Umur; Cagatay Oktenli; Serkan Celik; Fatih Tangi; Ozkan Sayan; Yavuz S. Sanisoglu; Osman Metin Ipcioglu; Hakan Terekeci; Cihan Top; Selim Nalbant; Yasar Kucukardali

Aim:  The aim of this study is to examine the relation between body iron, oxidative stress and cognitive function in elderly.


Respiration | 2008

Effect of Corticosteroids on Hemostasis and Pulmonary Arterial Pressure during Chronic Obstructive Pulmonary Disease Exacerbation

Erdogan Kunter; Ahmet Ilvan; Namik Ozmen; Ersin Demirer; Ahmet Ozturk; Kadir Avsar; Ozkan Sayan; Zafer Kartaloglu

Background: Hemodynamic and hemostatic abnormalities are reportedly frequent in chronic obstructive pulmonary disease (COPD). Objectives: We investigated the changes in systolic pulmonary artery pressure (PAPs) and hemostatic status and the effects of systemic steroid treatment (SST) during COPD exacerbation. Methods: Consecutive 26 male and 4 female patients as well as 10 controls were enrolled. The nonsteroid treatment (NST) group received standard treatment without steroids, and the other group received additional SST. Initial values of blood gases, spirometry and PAPs, P-selectin, D-dimer and fibrinogen levels, activities of thrombocyte aggregation, antithrombin III (AT III), protein C (PC), protein S, activated PC resistance (APCR), prothrombin time and partial thromboplastin time were obtained and compared with values at day 10. Results: Improvement in spirometry and blood gases was more prominent with SST. At presentation, patients had higher PAPs, P-selectin, D-dimer and fibrinogen but lower AT III levels than controls. PAPs and fibrinogen levels significantly decreased in the SST group while P-selectin levels further increased in the NST group. The D-dimer level significantly decreased in both groups. Means of AT III, PC and protein S increased in the SST and decreased in the NST group, but only the decrease in PC in the NST group was meaningful. Compared with the controls, AT III levels in the NST group and activated PC resistance in the SST group were significantly decreased. Thrombocyte aggregation tests suggested an incline after 10 days in both groups. Conclusions: We suggest that in patients with COPD exacerbation, addition of systemic corticosteroids to treatment results in better outcome in normalization of PAPs, hemostasis, pulmonary functions and blood gases.


International Journal of Hematology | 2010

High frequency of MEFV gene mutations in patients with myeloid neoplasm

Cagatay Oktenli; Ozkan Sayan; Serkan Celik; Alev Akyol Erikci; Yusuf Tunca; Hakan Terekeci; Elcin Erkuvan Umur; Yavuz S. Sanisoglu; Deniz Torun; Fatih Tangi; Burak Sahan; Selim Nalbant

We aimed to investigate the rate of MEFV, the gene mutated in familial Mediterranean fever, mutations in patients with myeloid neoplasm and to determine if known mutations of MEFV cause a tendency for myeloid neoplasms. The frequency of the five most common MEFV gene mutations (M694V, M680I, V726A, E148Q and M694I) was determined in 26 patients with myeloid neoplasm. We identified 1 homozygous (E148Q/E148Q), 1 compound heterozygous (M694V/E148Q) and 5 heterozygous MEFV gene mutations; none had their own and/or family history compatible with familial Mediterranean fever. The mean overall mutation rate was 0.269. We found a high frequency of carriers in patients with myelodysplastic syndrome (66.6%), polycythemia vera (33.3%) and acute myeloid leukemia (28.6%). However, there was no MEFV gene mutation in patients with chronic myeloid leukemia. In conclusion, this study reports for the first time a possibly high prevalence of MEFV gene mutations in patients with myeloid neoplasm, especially myelodysplastic syndrome, polycythemia vera and acute myeloid leukemia. Our findings could open new perspectives for MEFV gene mutations in myeloid neoplasms and its association with tumor promotion. Further research is needed to determine the actual role of MEFV gene mutations in these malignancies.


Clinical Lymphoma, Myeloma & Leukemia | 2009

Acute Myeloid Leukemia Complicating Multiple Myeloma: A Case Successfully Treated With Etoposide, Thioguanine, and Cytarabine

Alev Akyol Erikci; Ahmet Öztürk; Emre Tekgunduz; Ozkan Sayan

BACKGROUND The association of acute leukemia and multiple myeloma (MM) has been usually described not only as a complication of chemotherapy but also in the absence of chemotherapy or together at the time of diagnosis. Such leukemias are typically acute myeloid leukemia (AML). The myelomonocytic subtype is particularly found. CASE REPORT We report a case of a 68-year-old female who developed AML 2 years after the diagnosis of light chain (kappa) myeloma. She had been treated with oral melphalan and prednisone for MM. The patient was treated with an anthracycline-lacking therapy consisting of etoposide 120 mg/m2, thioguanine 100 mg/m2 orally twice daily on 1-5 days, and cytarabine 40 mg/m2 subcutaneously on day 1 (ETC) because of poor cardiac performance. CONCLUSION Following ETC therapy our particular patient has been in complete hematologic remission for 29 months. This therapy might be a safe alternative in secondary leukemia especially for elderly patients.


Central European Journal of Medicine | 2010

Platelet indices in patients with colorectal cancer

Bülent Karagöz; Ilker Sucullu; Ozkan Sayan; Tolga Tuncel; Ali İlker Filiz; Ergün Yücel; Alpaslan Özgün; Alev Akyol Erikci; Ahmet Alacacioglu; Emin Gökhan Kandemir

The interaction between cancer cells and platelets has been known for a long time. Although platelet indices have been also investigated in several clinical settings, it has not been exactly demonstrated in cancer patients. We investigated platelet indices in colorectal cancer patients and compared with healthy subjects. Two hundred and twenty-one colorectal cancer patients and 110 healthy subjects were enrolled into the retrospective study. Data were obtained from computerized medical records of our hospital. Medical record review was performed for all patients regarding thrombocyte indices. Platelet count (325.000/mm3 ± 265.000/mm3 vs 267.000/mm3 ± 67.000/mm3; p=0.025; respectively) and plateletcrit (Pct) (0.25% ± 0.10 vs 0.21 ± 0.05; p<0.001; respectively) were increased in patients compared with healthy subjects while mean platelet volume (MPV) and platelet distribution width (PDW) were similar. The platelet indices were not related to existence of metastasis or acute abdomen. Platelet count and Pct, but not MPV and PDW, are elevated in colorectal cancer patients. Future studies that investigate platelet morphology, function, and putative role of platelets in tumorigenesis and metatasis should be established.


Central European Journal of Medicine | 2009

Prognostic value of mean platelet volume in patients with upper gastrointestinal bleeding

Selim Nalbant; Eylem Cagiltay; Hakan Terekeci; Mustafa Kaplan; Burak Sahan; Ozkan Sayan; Cagatay Oktenli

This study included patients with upper gastrointestinal hemorrhage who were treated in intensive care unit of GATA Haydarpasa Training Hospital, Division of Internal Medicine during 1 year. Medical and demographic data of the patients were recorded. These patients were followed for 3 months after being discharged from the intensive care unit. Of the 50 patients in the study, 18 were female (36%), 32 were male (64%). The mean age was 47±2 years, and the ages ranged between 17 and 89 years. We did not find any statistically significant results in our evaluation of the relationship between the mean platelet volume and the number of transfusions, endoscopic findings, and prognosis after 3 months of follow-up.

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Hakan Terekeci

Military Medical Academy

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Selim Nalbant

Military Medical Academy

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Orhan Türken

Military Medical Academy

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