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Öğe Clinical, pathological and radiological features of paraspinal textiloma: report of two cases and review of the literature(Termedia Publishing House Ltd, 2009) Hakan, Tayfun; Aydoseli, Aydin; Demir, Kemal; Aker, FuegenTextiloma is a term Used for retained cottonoid or surgical sponge in the operation field. Although they occur mostly after thoracic or abdominal operation, they can also be encountered after surgery of extremities or the spine. There are few reports of spinal cases in which MR and CT imaging findings of textilomas have been described. In this report, two additional cases with MR, CT and pathological features of paraspinal textilomas are described. CT image demonstrated a paraspinal mass simulating a malignant tumour. While T1-weighted MR images showed the masses with low signal intensity, T2-weighted MR images showed heterogenous masses with low and high signal intensities.Öğe Imaging Features of Unusual Intracranial Cystic Meningiomas(Elsevier Science Bv, 2007) Demir, M. Kemal; Musluman, Murat; Kilicoglu, Gamze; Hakan, Tayfun; Aker, Fugen V.Objective: To describe the imaging features of unusual intracranial cystic meningiomas in infants and adults. Methods: We retrospectively reviewed the magnetic resonance and computed tomography findings for 2 female patients and 3 male patients, ranging in age from 1 to 73 years (median 41 years), with histopathologically proven cystic meningioma. Result: Although cystic meningiomas usually appear as solid and cystic masses, they may present as a mainly multicystic lesion. The wall of a cystic part of the meningioma may include both enhancing and unenhancing areas at imaging. The cystic portion of a meningioma is hypointense on diffusion-weighted images and markedly hyperintense on corresponding apparent diffusion coefficient maps. Conclusion: Cystic meningiomas may vary in appearance at imaging. They can be very challenging when present in infants. Knowledge of imaging findings and awareness of variability in the differential diagnosis can help to avoid preoperative diagnostic pitfalls.Öğe The redundant nerve root syndrome of the cauda equina(Turkish Neurosurgical Soc, 2008) Hakan, Tayfun; Celikoglu, Erhan; Aydoseli, Aydin; Demir, KemalThe redundant nerve root syndrome is defined as the association of high-grade extradural lumbar spinal stenosis with large, elongated and tortuous nerve roots. Acquired elongation of nerve roots due to the mechanical trapping at the level of lumbar spinal stenosis is assumed to be the possible mechanism. It is believed that the cause is a squeezing force due to the chronic compression. The most common clinical symptoms are low back pain and leg pain. Although lumbar spinal canal stenosis is common, the entity has rarely been discussed in the literature. Here we present the MR imaging and intraoperative appearance of the condition with a brief discussion in a 71-year-old woman.