Browsing by Author "Unal, O."

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The Association of Tethered Cord, Syringomyelia, Diasto-Metamyelia, Spinal Epidermoid, Spinal Lipoma and Dermal Sinus Tract in a Child
(Assoc Royal Soc Scientifiques Medicales Belges, 2010) Avcu, S.; Koseoglu, M. Necat; Bulut, M. Deniz; Ozen, O.; Unal, O.
We report on a 5-year-old boy presenting with tethered cord, diastometamyelia, spinal dysraphism, terminal lipoma, spinal epidermoid, and dermal sinus tract with CT, conventional MRI, and diffusion-weighted MRI findings. To the best of our knowledge, our case has the property to be the first case in the literature showing the association of these pathologies all together.
Clinical and Magnetic Resonance Imaging Findings of Siblings From a Turkish Family With Mother Diagnosed as Multiple Sclerosis: Case Report
(Sage Publications Ltd, 2006) Anlar, O.; Sayin, R.; Kayan, M.; Tombul, T.; Unal, O.
Endovenous Laser Ablation Treatment With 980 Nm Diode Laser for Saphenous Vein Insufficiency: 6 Months Follow Up Results
(Assoc Royal Soc Scientifiques Medicales Belges, 2014) Beyazal, M.; Avcu, S.; Ozen, O.; Yavuz, A.; Bora, A.; Unal, O.
Objective: Superficial venous insufficiency is a common problem associated with varicose veins which, if untreated, may progress to venous ulceration. Endovenous laser ablation (EVLA) is a new, minimally invasive method for management of superficial venous insufficiency and varicose veins. The aim of this study was to demonstrate the effectiveness of 980 nm EVLA for treatment of symptomatic saphenous venous insufficiency and to present its early outcomes. Methods: Thirty-eight great saphenous veins and 5 small saphenous veins in 40 patients with saphenofemoral reflux were treated with 980 nm diode endovenous laser equipment. The diameter and length of the vein treated, total laser energy and energy density (Joules/cm) delivered were recorded. To determine the severity of the venous disease Venous Clinical Severity Score (VCSS) and Visual Analogue Scale (VAS) were used. Patients were followed up for 6 months after the procedure. Complications were recorded prospectively. Results: Forty-three saphenous veins in 40 patients were treated. The mean age of the patients was 39.9 (range 2172) years. The mean diameter and length of the veins were 4.9 mm (range, 3.5 to 8.5 mm) and 30.2 cm (range, 16 to 50 cm), respectively. At 6 months follow-up, total occlusion rate was 95.4% (41/43), and recanalization rate was 4.6%. Significant decrease was observed for VCSS and VAS scores after the procedure. No major complication was detected. Conclusion: EVLA treatment for superficial venous insufficiency is safe and can be carried out under local anaesthesia in an outpatient setting with good patient satisfaction and low complication rates.
Myxoid Solitary Fibrous Tumour of the Meninges
(Blackwell Publishing, 2006) Kosem, M.; Arslan, M.; Kontas, O.; Unal, O.
Posterior Cerebral Artery Involvement in Moyamoya Disease
(2004) Harman, M.; Etlik, O.; Unal, O.; Sakarya, M.E.
A ten-year-old girl arrived at the hospital with progressive loss of muscular strength on the right side of the body. The cranial MRI showed left fronto-parietal ischemia and atrophic changes in the left parietal lobe. Brain MRI initially disclosed a narrow left MCA. MRA and digital angiography confirmed the diagnosis of brain obstructive chronic vascular disease (Moyamoya). Angiography results demonstrated occlusion of the left MCA and right posterior cerebral artery, with Moyamoya vessels. It therefore appears that in some patients Moyamoya disease is accompanied by posterior circulation involvement.
Power Doppler Sonography in the Diagnosis of Graves’ Disease
(2000) Arslan, H.; Unal, O.; Algün, E.; Harman, M.; Sakarya, M.E.
In addition to color and pulsed Doppler sonography findings, we aimed to describe power Doppler sonography findings in Graves’ disease in this study. Twenty-three patients with Graves' disease were imaged with gray-scale, color and power Doppler sonography. Twenty normal volunteers were examined by the same equipment and the same technique as a control group. A subjective grading system was used to categorize the vascularization in pulsed Doppler sonography images from normal to markedly increased vascularization. Power Doppler sonography exhibited diffuse hypervascularity in the thyroid gland in all patients. The flow was covering about all the parenchyma. Four patients showed mild, 12 patients moderate and seven patients marked vascularity. The intensity of power Doppler flow pattern was not correlated with the severity of the disease. This study demonstrated that power Doppler sonography is a convenient, time saving, inexpensive and noninvasive method as compared with isotope scan and some other laboratory tests for confirmation of Graves’ disease. © 1999 Elsevier Science Ireland Ltd.
The Relationship of Sex Differences To the Anatomy of the Corpus Callosum in the Living Human Being
(Turkish Neurosurgical Society, 1996) Aydinlioglu, A.; Diyarbakirli, S.; Yuceer, N.; Keles, P.; Unal, O.; Erdogan, A.R.
The area of the midsagittal section of the corpus callosum, particularly in the region of the splenium was found to be greater in women than in men. The magnetic resonance imaging of seventy adults was examined and showed the same association previously observed, between sex differences and area of the corpus callosum and its splenium. The quantitative results supported a relationship between variations in callosal anatomy and sex differences in human beings. Findings are discussed in the light of the related literature.
Report of a Girl With Vacterl Syndrome and Right Pulmonary Agenesis
(Medecine Et Hygiene, 2009) Avcu, S.; Akgun, C.; Temel, H.; Arslan, S.; Akbayram, S.; Unal, O.
Report of a girl with VACTERL syndrome and right pulmonary agenesis: VACTERL syndrome is a combination of vertebral anomalies (V), anal atresia (A), congenital heart defects (C), tracheo-esophageal fistula (T), esophageal atresia (E), abnormalities of kidneys (renal anomalies, R) and limbs (L). In the present patient right pulmonary agenesis is co-occurring with VACTERL syndrome. We report on this case because the association of right pulmonary agenesis and VACTERL syndrome is rare.
The Role of Diffusion-Weighted Mr Imaging and Adc Values in The Diagnosis of Gastric Tumors
(Assoc Royal Soc Scientifiques Medicales Belges, 2012) Avcu, S.; Arslan, H.; Unal, O.; Kotan, C.; Izmirli, M.
Background: The aim of this study was to investigate the role of diffusion-weighted MR imaging (DWI) in the diagnosis of gastric tumors by means of measuring the apparent diffusion coefficient (ADC) values of these lesions, and making a comparison with the endoscopic biopsy results. Subjects and Methods: Seventy patients having gastric tumor constituted the case group. For the control group 30 healthy individuals were included. Abdominal MRI examinations were performed with a 1,5Tesla unit. DWI examinations were obtained by single shot spin echoplanar imaging. The ADC was measured based on the tissue of the gastric tumoral entities and normal gastric mucosa in the control group. Results: Mean ADC values were 0,84 +/- 0,17 x 10(-3) mm(2)/s and 1,79 +/- 0,08 x 10(-3) mm(2)/s in gastric tumor group and in control group, respectively, being statistically significant (p < 0.05).There was no significance among ADC values of adenocarcinoma subgroups. The comparison of the ADC values in the adenocarcinoma and lymphoma cases were also found to be statistically significant. Conclusions: DWI is beneficial in the diagnosis of malignant gastric lesions by the aid of ADC measurements. Although ADC quantification seems to be invaluable in the evaluation of histopathologic subgroups of adenocarcinoma, it can help in the diagnosis of gastric lymphoma.
The Role of Power Doppler Ultrasonography in the Diagnosis of Prostate Cancer: a Preliminary Study
(1998) Sakarya, M.E.; Arslan, H.; Unal, O.; Atilla, M.K.; Aydin, S.
Objective. To determine the role of transrectal power Doppler ultrasonography (PDU) in the diagnosis of prostate cancer. Patients and methods. Thirty-six patients (mean age 66.4 years, SD 7.7, range 59-82) with possible prostate cancer, suspected from an abnormal digital rectal examination or elevated prostate specific antigen level, underwent transrectal ultrasonography, transrectal PDU and biopsy. The vascularity on PDU was graded on a scale of 0-2, where grade 1-2 was considered positive and grade 0 negative. Results. The vascularity was grade 2 in 11 patients, grade 1 in 11 and grade 0 in 14; 20 of the 36 (56%) patients had prostate cancer. Of the 22 patients positive on PDU, 18 had malignant disease and four benign; two of 20 patients with histopathologically confirmed malignancy had a normal PDU. The sensitivity of PDU was 90%, the specificity 75% and the positive predictive value 82%, Conclusion. Focal hypervascularity on PDU was associated with an increased likelihood of prostate cancer. Although ultrasonography alone cannot detect all cancers, even using PDU, the technique appears to increase the sensitivity and to help identify appropriate sites for biopsy.
The Value of Diffusion-Weighted Mri in the Diagnosis of Malignant and Benign Urinary Bladder Lesions
(British inst Radiology, 2011) Avcu, S.; Koseoglu, M. N.; Ceylan, K.; Dbulutand, M.; Unal, O.
Objectives: To investigate the role of diffusion-weighted MRI (DWI) in the diagnosis of urinary bladder (UB) tumours by means of measuring apparent diffusion coefficient (ADC) values. Methods: A total of 83 people aged between 18 and 86 years were included in the study: 63 patients with UB pathology (46 malignant, 17 benign) constituted the case group; 20 individuals without any UB pathology constituted the control group. DWI was applied to all individuals. The ADC values were measured based on the tissue of the UB mass entities and normal UB wall in the control group. Results: The mean ADC value in the UB carcinoma group was significantly lower than that in the control group: 1.0684 +/- 0.26 x 10(-3) mm(2) s(-1) and 2.010 +/- 0.11 x 10(-3) mm(2) s(-1), respectively (p < 0.01). There was a significant difference among the mean ADC values of different grades of malignant tumours, corresponding to 0.9185 +/- 0.20 mm(2) s(-1) and 1.281 +/- 0.18 mm(2) s(-1) in high-grade and low-grade malignant UB carcinomas, respectively (p < 0.01). The ADC value in the carcinoma group was significantly lower than that in the benign lesion group: 1.0684 +/- 0.26 x 10(-3) mm(2) s(-1) and 1.803 +/- 0.19 x 10(-3) mm(2) s(-1), respectively (p < 0.01). All 46 malignant lesions displayed a restriction in diffusion; 4 of the 17 benign lesions displayed a mild restriction in diffusion. The sensitivity, specificity and accuracy of DWI in the diagnosis of malignant UB lesions was 100%, 76.5% and 93.65%, respectively. Conclusion: DWI can be beneficial in the differentiation of benign and malignant UB lesions, as well as of high-grade and low-grade UB carcinomas, using quantitative ADC measurements.