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Öğe Giant cervicothoracic extradural arachnoid cyst: Case report(2006) Hamamcioglu M.K.; Kilincer C.; Hicdonmez T.; Simsek O.; Birgili B.; Cobanoglu S.The pathogenesis, etiology, and treatment of the spinal arachnoid cyst have not been well established because of its rarity. A 57-year-old male was presented with spastic quadriparesis predominantly on the left side. His radiological examination showed widening of the cervical spinal canal and left neural foramina due to a cerebrospinal fluid - filled extradural cyst that extended from C2 to T2 level. The cyst was located left anterolaterally, compressing the spinal cord. Through a C4-T2 laminotomy, the cyst was excised totally and the dural defect was repaired. Several features of the reported case, such as cyst size, location, and clinical features make it extremely unusual. The case is discussed in light of the relevant literature. © 2006 Springer-Verlag.Öğe Hereditary neuropathy with liability to pressure palsies in a Turkish patient (HNPP): A rare cause of entrapment neuropathies in young adults(Turkish Neurosurgical Society, 2008) Çelik Y.; Kilinçer C.; Hamamcio?lu M.K.; Balci K.; Birgili B.; Çobano?lu S.; Utku U.Hereditary neuropathy with liability to pressure palsies (HNPP) is an autosomal dominant nerve disease usually caused by 1,5 Mb deletion on chromosome 17p11.2.2-p12, the region where the PMP-22 gene is located. The patients with HNPP usually have relapsing and remitting entrapment neuropathies due to compression. We present a 14-year-old male who had acute onset, right-sided ulnar nerve entrapment at the elbow. He had electrophysiological findings of bilateral ulnar nerve entrapments (more severe at the right side) at the elbow and bilateral median nerve entrapment at the wrist. Genetic tests of the patient demonstrated deletions in the 17p11.2 region. The patient underwent decompressive surgery for ulnar nerve entrapment at the elbow and completely recovered two months after the event. Although HNPP is extremely rare, it should be taken into consideration in young adults with entrapment neuropathies.Öğe Posterior fossa approach: Microneurosurgical training model in cadaveric sheep(Turkish Neurosurgical Society, 2006) Hiçdönmez T.; Birgili B.; Tiryaki M.; Parsak T.; Çobano?lu S.We designed a microneurosurgical training model for residents in neurosurgery to practice the basic steps of the posterior fossa approach. The training material consisted of a fresh cadaveric sheep cranium. A four-step approach was designed to open the cisterna magna, access the fourth ventricle, identify the Sylvian aqueduct, and perform microdissection of the lower cranial nerves. We conclude that the use of the cadaveric sheep cranium represents a useful method to accustom residents of neurosurgery as it simulates well the steps of standard microneurosurgery for posterior fossa approach in infants and children.
