Publications by authors named "Guzide Gokhan"

Aim: FK506 (also known Tacrolimus, Prograf) is an immunosuppressant drug which is used to prevent rejection after organ transplantation. Although there are several studies on neuroprotective effect of FK506 on brain ischemia, few reports on effects of FK506 after peripheral nerve ischemia have been reported. In the present study, we examined the size of watershed area after stripping of the epineurial vessels and studied the effect of FK506 on reduction of the size of watershed area.

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PNETs of the spinal cord are aggressive and local recurrence and/or leptomeningeal spread is common. Primary spinal PNETs are extremely rare and most cases involving the spinal cord are drop metastases from primary intracranial tumors by cerebrospinal fluid. Herewith, we present a 40-day-old infant with multilevel primary spinal PNET at Th12-L1 and L5-S1 levels associated with hydrocephalus occurring nearly 15 days after the operation.

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We have investigated the potential application of elastic light single-scattering spectroscopy (ELSSS) as an adjunctive tool for intraoperative rapid detection of brain tumors and demarcation of the tumor from the surrounding normal tissue. Measurements were performed on 29 excised tumor specimens from 29 patients. There were 21 instances of low-grade tumors and eight instances of high-grade tumors.

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Inflammatory myofibroblastic tumor of the liver is an uncommon lesion of uncertain pathogenesis that has a unique histological appearance. Symptomatology and clinical findings in most cases suggest malignancy, and despite the advances in imaging techniques, the preoperative diagnosis of this tumor is difficult. We describe herein a case of inflammatory myofibroblastic tumor of the liver with a review of the literature.

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Cutaneous melanoma is the most serious form of skin cancer and is curable only if it is detected early. The most effective treatment for the melanoma is surgical excision of the lesion. Traditionally, wide margins of excision have been used for effective treatment, but are not always desirable due to increased risk of infection and esthetic reasons.

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Central neurocytoma is a rare neuroectodermal tumor generally found in young adults. It mainly originates from lateral ventricles. Extraventricular location of this kind of tumor, especially spinal cord involvement, is extremely rare.

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An atypical teratoid/rhabdoid tumor of the central nervous system (CNS) is a rare, aggressive neoplasm found in infants and children that has similar characteristics to CNS primitive neuroectodermal tumors/medulloblastomas. The authors present the case of a patient with an atypical teratoid/rhabdoid tumor and discuss the imaging, histopathological, immunohistochemical, and cytogenetic findings. Tumor cells displayed positive reactions for vimentin, epithelial membrane antigen, and cytokeratin, and they displayed no reaction for glial fibrillary acidic protein, desmin, and actin.

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Epithelioid hemangioendotheliomas (EHE) are rare vascular tumors which generally originate from soft tissues and visceral organs. Primary bone EHEs, especially those occurring in the spine region, are extremely rare. Our case is that of a 30-year-old man who was admitted to hospital with low back pain, difficulty in walking, post-voiding urinary incontinence and numbness in the caudal area.

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The purpose of this experimental study was to evaluate possible upgrading effects of systemic creatine monohydrate administration on the reinnervation of denervated muscle. At the same time, the protective effect of the agent on denervated muscle until ultimate reinnervation after nerve repair was quantified. The functional outcome of muscle reinnervation after creatine monohydrate application was compared with a control group.

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Unilateral pulmonary agenesis is a very rare developmental malformation that is often associated with other anomalies. It can be asymptomatic or present with respiratory symptoms. Our case is a female newborn infant who had been taken to the hospital suffering from difficulty in breathing at the first day of birth.

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