Okkeş Ibrahim Karahan

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Six existing minimally invasive techniques for the treatment of primary and secondary malignant hepatic tumors--radio-frequency ablation, microwave ablation, laser ablation, cryoablation, ethanol ablation, and chemoembolization--are reviewed and debated by noted authorities from six institutions from around the world. All of the authors currently believe(More)
OBJECTIVE We conducted this study to determine the spectrum of CT findings of tumor recurrence after radiofrequency ablation of primary and secondary malignant hepatic tumors. MATERIALS AND METHODS Twenty-five patients, 10 with hepatocellular carcinoma (HCC) and 15 patients with metastases who developed tumor recurrence after radiofrequency ablation of(More)
OBJECTIVE To define the value of multislice computed tomography (CT) in the diagnosis of acute mesenteric ischemia (AMI). MATERIALS AND METHODS Two hundred patients (age range: 20-92 years) who were referred to the emergency CT department with a clinical suspicion of AMI were prospectively included in the study. CT examinations were performed with a(More)
In this paper, we report a case of angiomyolipoma with cavoatrial extension in a 55-yr-old woman. Multislice computed tomography revealed a hypodense mass extending into the right atrium through the right renal vein and inferior vena cava without a renal mass. The patient underwent surgery, and right atrial mass was resected. Pathologic evaluation revealed(More)
To investigate the effects of free oxygen radicals and various antioxidants on bone healing after experimental formation of fracture. Fifty male rats were used and divided into five groups (ten rats in each). The right forelimbs of the rats were broken by bimanual compression method. One hour before this procedure, 5 ml/kg of intraperitoneal (i.p.)(More)
In this article, we present radiological findings in three patients with mesenteric, gastric, and rectal carcinoid tumors. More than 90% of the carcinoid tumors arise in the gastrointestinal system (GIS). They comprise 2% of all GIS tumors and are usually located in the small intestine and the appendix. On the other hand, gastric, rectal, and mesenteric(More)
OBJECTIVE The chest radiography and TCT findings in children who had contacted with adult family members with active pulmonary tuberculosis were compared. The contributions of thoracic computed tomography to the diagnosis of tuberculosis were investigated. METHODS AND MATERIAL The children who were 0-16 years old (n=173) and children of families with an(More)
PURPOSE To describe color Doppler ultrasonography findings of bladder tumors and to investigate the correlation between these findings with stage and histopathological grade. MATERIAL AND METHODS Twenty-four patients with bladder tumors were assessed with color Doppler ultrasonography for tumor size, presence of vascularity, vascular pattern, and spectral(More)
Globus pallidus involvement is a well-known magnetic resonance (MR) imaging finding of acute kernicterus. However, it is not clear how early the involvement of globus pallidus occurs and whether or not it is seen in every case. Therefore, we aimed to investigate the globus pallidus involvement in 13 neonates with acute kernicterus by MR imaging. Thirteen(More)
Multiple bile duct hamartomas [von Meyenburg complex (VMC)] are benign liver malformations that include biliary cystic lesions, with congenital hepatic fibrosis being the cause of ductal plate malformations. This rare entity is usually isolated and detected incidentally in 0.6-5.6% of reported autopsy series. Its clinical significance is that it may be(More)