Publications by authors named "Engin Ok"

Background And Purpose: Perfusion parameters obtained in F-18 FDG PET/CT performed for staging purposes in breast cancers may provide additional information about tumor biology as well as glucose metabolism. The aim of this study was to evaluate throughout F-18 FDG PET/CT the relationship between blood flow and glucose metabolism and histological parameters of the primary tumor, normal mammary gland, and axillary lymph nodes in breast cancer patients.

Materials And Methods: Sixty six female patients (mean age 51 y ± 12,81) were prospectively included to this study.

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Objective: Breast cancer is a heterogenous disease, and genetic profiling helps to individualize adjuvant treatment. The Oncotype DX is a validated test to predict benefit of adjuvant systemic treatment. The aims of this study are to determine the costs of chemotherapy in government hospitals in Turkey and evaluate the cost-effectiveness of the Oncotype DX from the national insurance perspective.

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Objective: The aim of the present study was to investigate the association between non sentinel lymph node metastasis (NSLNM) and clinicopathological factors, particularly in the case of sentinel lymph node (SLN) metastasis in one or two, in clinically node negative patients with breast cancer.

Methods: Between 10/2010 and 10/2014, 350 sentinel lymph node biopsy (SLNB) were performed in patients with histologically proven primary breast cancer in our clinic. The data collection includes the following characteristics: age, pathological tumor size, histological type, histological grade, lymphovascular invasion (LVI), number of positive SLN, size of the SLN metastasis (macrometastasis, micrometastasis, isolated tumor cells), multifocality (MF), extracapsuler invasion (ECI) of the SLN, the estrogen receptor (ER) status, the progesterone receptor (PR) status and the Her 2 receptor status, Ki 67 reseptor status.

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Introduction: Breast cancer is the most common malignancy among Turkish women and the rate of early stage disease is increasing. The Oncotype DX(®) 21-gene assay is predictive of distant recurrence in ER-positive, HER2-negative early breast cancer. We aimed to evaluate the impact of the Recurrence Score(®) (RS) on treatment decisions and physician perceptions in Turkey.

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Objective: Breast cancer is the most common malignancy among Turkish women and the rate of early stage disease is increasing. The Oncotype DX 21-gene assay is predictive of distant recurrence in ER-positive, HER2-negative early breast cancer. We aimed to evaluate the correlations between Recurrence Score (RS) and routine risk factors.

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Background: Laparoscopic adrenalectomy (LA) is a safe and minimally invasive operation for benign adrenal tumours. The purpose of this study was a retrospective analysis of outcomes following laparoscopic lateral transabdominal adrenalectomy performed for benign adrenal tumours responsible for various endocrinological disorders and non-functioning tumours.

Methods: A total of 100 laparoscopic adrenalectomy were carried out between January 2007 and March 2013 via the lateral transabdominal approach.

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Objective: The aim of the study was to evaluate the effectiveness of gastric tonometry in the diagnosis of acute mesenteric ischemia in cases where a contrast-enhanced computed tomography cannot be obtained.

Material And Methods: The gastric pH (pHi) and gastric CO2 (gpCO2) were measured with gastric tonometry catheter, preoperatively and postoperatively at 24 hours, in patients with suspicion of acute mesenteric ischemia. Simultaneous evaluation of blood gases and blood lactate levels were performed.

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Background: One of the most important factors in breast cancer (BC) mortality is treatment delay. The primary goal of this survey was to identify factors affecting the total delay time (TDT) in Turkish BC patients.

Methods: A total of 1031 patients with BC were surveyed using a uniform questionnaire.

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Background: Idiopathic granulomatous mastitis (IGM) is an uncommon chronic inflammatory disease of the breast with uncertain optimal treatment regimen. In this study, our purpose was to report our clinical experience with 74 IGM patients who were treated wide local excision with or without steroid therapy.

Patients And Method: 74 cases diagnosed histologically as IGM were identified from surgical and pathological records between January 1995 and January 2012.

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Objective: Lipid emulsions containing omega-3 are known to have positive effects on patient's prognosis due to anti-inflammatory properties. The aim of this study was to investigate the effects of omega-3 enriched total parenteral nutrition (TPN) emulsion containing omega-9 on biochemical parameters, inflammatory mediators in septic patients.

Methods: Thirty-two participants who were not fed orally for over five days and needing TPN support were included in this prospective, randomized and double-blind clinical study.

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Background: The aim of this study was to evaluate the necessity of preventive colostomy for Fournier's gangrene of the anorectal region.

Methods: The medical records of 37 patients with perianal Fournier's gangrene were evaluated retrospectively. Debridement(s) alone was performed in 18 patients (Group D), while debridement(s) plus Hartmann colostomy was performed in 19 patients (Group D&HC).

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Celiac artery compression syndrome is a rare disorder characterized by postprandial intestinal angina caused by insufficient blood supply to the gastrointestinal organs. In this syndrome, the root of the celiac artery is compressed and narrowed by the median arcuate ligament of the diaphragm during expiration. We report here 3 such cases that were diagnosed by the use of multislice computed tomography.

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The aim of this study was to evaluate the clinical presentation of, predisposing factors in, and early and long-term outcome of patients treated surgically for intraperitoneal ruptured liver hydatid cysts. Medical records of 27 patients with traumatic rupture of hydatid cysts were evaluated retrospectively, as were records of 347 patients with nonperforated hydatid cysts. The ratio of perforation cases to nonperforation cases was 7.

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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.

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Background: Transforming growth factor (TGF) beta is a potent inhibitor of hepatocyte DNA synthesis and liver regeneration. TGF-beta(1) expression progressively increases in obstructive jaundice. We investigated the effect of TGF-beta(1) blockage on liver regeneration in rats induced with obstructive jaundice.

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Background: The phosphodiesterase inhibitors (PDEIs) have been proposed to improve hepatic reperfusion injury and hepatosplanchnic circulation, but the effects of these agents on liver regeneration have not been investigated thoroughly. The aim of this study was to investigate the effect of amrinone, a PDEI, on liver regeneration in rats.

Materials And Methods: Sixty rats were divided into two groups, control and amrinone.

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Objective: Laparoscopic splenectomy (LS) has gained wide acceptance as a safe, effective alternative to open splenectomy (OS) in the treatment of hematologic disorders. The aim of this study was to compare two cohorts of patients with similar characteristics, who underwent LS and OS in a single university teaching center.

Methods: Records were reviewed from 30 patients who underwent LS for a hematologic disease and compared with a control group of 38 patients undergoing OS for hematologic disease.

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The adverse health effects linked with chromium and manganese and the diverse cellular and molecular effects of chromium and manganese make the study of chromium and manganese carcinogenesis and toxicology very interesting and complex. Quantitative elemental analysis of scalp hair of breast cancer patients (stage III) (n=26) and controls (n=27) were used to study to find correlation and possible changes between breast cancer and healthy controls. The graphite furnace atomic absorption analysis of quantitative method was used for the determination of chromium and manganese element levels.

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Background: This study investigated injuries to the abdominal area of the body caused by large animals, as well as the management of this problem.

Methods: All the patients with large animal-related abdominal injuries over a 10-year period were identified retrospectively through the general surgery registrations.

Results: Overall, 113 patients were hospitalized after large animal encounters during the 10-year study period, 33 (30%) of which had large animal-related abdominal injuries.

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Background/aim: The main objective of this study was to compare the effects of olive oil to those of soybean oil on liver tissue regeneration following hepatic resection in rats.

Methods: Seventy albino Wistar rats were randomly assigned to seven groups which contained 10 rats each. Group 1 was the sham-treated group; groups 2 and 3 received total parenteral nutrition (TPN) containing soybean oil lipid emulsions (20% Lipofundin MCT/LCT) for 48 or 72 h; groups 4 and 5 received TPN containing olive oil (80%)/soybean oil (20%) lipid emulsions (ClinOleic 20%) for 48 or 72 h; group 6 was the control group for 48 h, and group 7 was the control group for 72 h.

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In a 60-year-old woman who underwent cholecystectomy and T-tube drainage for biliary ascariasis, postoperative bilirubin levels continued to increase. T-tube cholangiography revealed multiple filling defects in the bile ducts, which suggested roundworm reinfestation. Because the patient could not tolerate endoscopy, a percutaneous transhepatic approach with balloon dilatation of the ampulla of Vater and subsequent advancement of roundworms into the duodenum with an embolectomy balloon was used.

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Purpose: The operative strategy for left-sided large bowel obstruction remains controversial. Because a safe and definitive single-staged operation that avoided a colostomy would clearly be in the patients' best interest, we conducted a prospective study to compare the efficacy of single-staged surgery (SSS) supplemented by the milking and swabbing technique (MST), with the conventional Hartmann's procedure (HP).

Methods: In group 1 ( n = 37) we performed traditional HP by resecting the site of obstruction and constructing an end colostomy.

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Hydatidosis (echinococcosis) is endemic in the Mediterranean region, including Turkey. We evaluated the problem of perforation in hydatidosis. The clinical data on 21 patients with intra-abdominal hydatid cyst perforation who were treated in the last 10 years were evaluated retrospectively.

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