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Öğe Comparison of dynamic contrast-enhanced MRI parameters with 99mTc-sestamibi uptake ratios in malignant bone and soft-tissue tumours.(Springer, 2009) Sarikaya, A.; Tuncbilek, N.; Altaner, S.; Torun, N.; Korkmaz, U.; Yalniz, E.[Abstract Not Available]Öğe GORHAM-STOUT DISEASE OF THE HUMERUS(Assoc Royal Soc Scientifiques Medicales Belges, 2008) Yalniz, E.; Alicioglu, B.; Benlier, E.; Yilmaz, B.; Altaner, S.Gorham-Stout disease is characterized by local proliferation of small vascular or lymphatic channels resulting in progressive destruction and resorption of bone. The etiology and pathogenesis of the disease remains mostly unknown, despite some 175 reported cases. A case of Gorham-Stout disease of the humerus in a 14-year-old boy is described. The patient presented with progressive pain and deformity of the right arm. Although the disease was described in different bones of the body its location in the humerus is rare. We report the natural history and clinical follow-up in a young patient. A fibular graft was performed but 10 months later, resorption and pathological fractures occurred again. This study presents the radiographic and MRI features of Gorham disease.Öğe Hibernoma: A benign lipomatous tumor mimicking liposarcoma(Zerbinis Medical Publ, 2008) Yalniz, E.; Alicioglu, B.; Puyan, F. OzHibernoma is a rare, benign, slow-growing soft tissue tumor. It was named after its resemblance to the brown fat found in hibernating animals. Due to its rich vascularity and magnetic resonance appearance, this tumor may mimic a liposarcoma before tissue diagnosis. Complete resection with meticulous hemostasis is enough for treatment. Malignant potential has not been demonstrated. Herein we present a case of hibernoma arising from the left groin in a young man. The clinical presentation, radiographic and histopathologic features of this rare benign soft tissue tumor are presented. This tumor is clinically important because it is indistinguishable from malignant lesions.Öğe Non specific magnetic resonance features of chondromyxoid fibroma of the iliac bone(Zerbinis Medical Publ, 2007) Yalniz, E.; Alicioglu, B.; Yalcin, O.; Yilmaz, B.Chondromyxoid fibroma is a benign cartilaginous neoplasm. The tumor is rare, perhaps the rarest of all bone tumors. It is more common in long bones and rare in pelvic bones. We report a case of a 31-year-old woman with chondromyxoid fibroma arising from the iliac bone and presenting with leg pain due to compression on the femoral nerve. Magnetic resonance imaging (MRI) features were non specific for chondromyxoid fibroma. We emphasize the need to consider differential diagnosis of chondrosarcoma.Öğe The relation between the interpedicular distance and the maximum pedicular screw length in lumbar one vertebra(Edizioni Minerva Medica, 2011) Copuroglu, C.; Ciftdemir, M.; Yilmaz, A.; Ozcan, M.; Kaya, M.; Yalniz, E.Aim. The aim of this paper was to demonstrate the relation between the distance of the midline of the corpus and the screw entry point on the pedicle and the maximum screw length that can be applied in the pediculocorporeal screw trajectory. Methods. The distance between two pedicular screw entry points and the distance between screw entry point and the anterior cortex of the vertebra corpus in the midline, on computed tomography (CT) sections and the same distances on cadaveric bony L1 specimens, were measured. Interpedicular distance was divided into two and the distance between the midline and the screw entry point was found. These measurements were compared and a constant ratio was observed. The pedicular screw entry point was accepted as the point just lateral to the inferior articular process at the mid level of the transverse process. Results. When these measurements were compared, a constant ratio was observed. The ratio between the distance of the midline of the vertebra and the screw entry point and the distance between the screw entry point and the midline anterior cortex of the vertebral body, was 2.5 cm. When the distance between the midline of the vertebra and the screw entry point during the operation or by measuring half of the interpedicular distance on plane roentgenograms, is measured, the maximum length of the pedicular screw can be estimated. Conclusion. In this study, we described an easy method of determining the maximum pedicular screw length by measuring the distance between the midline level of the vertebra corpus (spinous process level) and pedicle screw entry point on coronal section.
