The Longest Angiographic and Clinical Follow-Up of Microsurgically Treated Giant Intracranial Aneurysms: Experience with 70 Cases.

Background: Giant intracranial aneurysms (GIAs), if left untreated, have an extremely poor natural history. Despite many reports about the surgical treatment of GIAs, their long-term clinical and angiographic results are unclear. To our knowledge, this study reports the longest clinical and angiographic follow-up of microsurgically treated GIAs in the English literature.

Aneurysm Clip Compression Technique in the Surgery of Aneurysms with Hard/Calcified Neck.

Objective: One of the most important technical problems in surgery to repair aneurysms is the presence of a hard/calcified neck. In this situation, various techniques can be used for proper clipping. In addition to well-known techniques, we have used a different technique for more than 10 years.

Occipitocervical fixation using occipital bone hooks and cervical lateral mass screws: analysis of 16 cases.

Aim: We present a series of 16 patients who underwent occipitocervical fixation with occipital bone hooks used as a substitute for occipital screws for the treatment of occipitocervical instability.

Material And Methods: In this technique; instrumentation was started following the decompression with insertion of screws into lateral masses. At the occipital level, two symmetrical burr holes were drilled and two occipital bone hooks were inserted into each burr hole with an inverted position with respect to each other.

Closed manual reduction maneuver of atlantoaxial rotatory dislocation in pediatric age.

Purpose: The purposes of this study were to characterize the clinical and radiological features of type 1 and type 2 atlantoaxial rotatory dislocations (AARD) and to evaluate the outcome of the manual reduction maneuver for these types of dislocations in pediatric patients.

Methods: This study considered 12 pediatric patients with AARD who were treated between January 2003 and March 2013. The diagnosis was established by clinical findings and 3D-CT.

Bilateral middle cerebral artery aneurysms: a comparative study of unilateral and bilateral approaches.

The best surgical method for the treatment of patients with bilateral middle cerebral artery (bMCA) aneurysms has not been fully determined yet. The main purpose of this study is to compare the surgical results of unilateral and bilateral approaches to bMCA aneurysms including mean operation time, mean hospital stay, and mean cost, in the experience of the same neurosurgical team. Between January 2001 and June 2010, 22 patients with bMCA aneurysms were surgically treated in our institution.

Isolated paralysis of glossopharyngeal and vagus nerve associated with type II occipital condyle fracture: case report.

Introduction: Occipital condyle fractures (OCFs) can occasionally be complicated with lower cranial nerve palsies.

Discussion: Isolated 9th and 10th cranial nerve palsies following OCF are very rare. To our knowledge, we report the first case of an early onset of 9th and 10th cranial nerve palsies with an early full recovery in short period of time and discuss the probable mechanism of isolated nerve palsy in the light of the relevant literature.

Craniocerebral injury resulting from pencil penetration.

Penetrating craniofacial trauma in pediatric age group is quite rare. A case is reported that presented with a pencil penetration injury entering from the anterior maxillary sinus through the orbital medial wall, and ethmoidal cells and septum, reaching the contralateral gyrus rectus of the frontal lobe. All the vital structures were preserved.

A demineralized calf vertebra model as an alternative to classic osteoporotic vertebra models for pedicle screw pullout studies.

Screws, clamps and other spinal instrumentation materials are tested using healthy animal and healthy human vertebrae, but the application of similar tests to an osteoporotic vertebra is generally neglected because of high costs and limited availability of high quality and consistent osteoporotic vertebrae. The objective of this study is to develop an in-vitro method to decrease the mineral content of an animal vertebra utilizing decalcifying chemical agents that alters the bone mineral density and some biomechanical properties to such an extent that they biomechanically mimic the osteoporotic spine. This study was performed on 24 fresh calf lumbar vertebrae.

Existence of cotton granuloma after removal of a parasagittal meningioma: clinical and radiological evaluation -a case report-.

Hemostatic agents, routinely used in neurosurgery to achieve intraoperative hemostasis may cause foreign body reaction. These may produce clinically symptomatic and radiologically apparent mass lesions. It should be kept in mind that retained cotton or rayon materials may mimic the appearance of a tumor or an abscess on MRI scan, especially at sides of previous craniotomies.

Hypothalamic hamartoma with bilateral anophthalmia.

Introduction: Hypothalamic hamartomas are congenital malformations. Clinically, they can be asymptomatic, but they cause seizures, mental retardation and precocious puberty in many cases.

Case Report: A 20-day-old boy with hypothalamic hamartoma and bilateral anophthalmia was presented.

Stress relaxation at the bone-pedicle screw interface in human bone.

Study Design: A biomechanical study using human lumbar vertebra.

Objectives: To assess the effects of stress relaxation on the pullout behavior of the pedicle screw in human bone.

Summary Of Background Data: The standard pullout test is widely used to assess screw-holding power; however, the effects of incremental deformation on the pullout behavior of pedicle screws are not known in human bone.

Intractable radicular and low back pain secondary inferior vena cava stenosis associated with Budd-Chiari syndrome: endovascular treatment with cava stenting: case report and review of the literature.

Study Design: The present report describes treatment of enlarged lumbar epidural veins in a patient with Budd-Chiari syndrome presenting with intractable radicular and low back pain.

Objective: To present a rare cause of radicular pain. To offer a case successfully to be treated with stenting of inferior vena cava stenosis.

Axial cyclic behavior of the bone-screw interface.

Screw fixation strength is investigated by using a pullout test. Despite many screw pullout studies, the effects of loading rate on the pullout behavior of pedicle screws are not known. The objective of this study was to assess the effects of loading rate on the pullout stiffness and strength of pedicle screws.

Thoracic transfacet pedicle screw fixation: a new instrumentation technique.

Object: Pedicle screw instrumentation of the thoracic spine remains technically challenging. Transverse process and costotransverse screw fixation techniques have been described as alternatives to pedicle screw fixation (PSF). In this study, the authors introduce thoracic transfacet PSF and compare its experimental biomechanical results with those of standard PSF in short-term cyclic loading in cadaveric thoracic specimens.

Trabecular architecture of lumbar vertebral pedicle.

Study Design: Investigation on architecture of lumbar pedicle.

Objective: To determine morphological properties of pedicular cancellous bone.

Summary Of Background Data: Many researchers have been stimulated to study trabecular architecture by improvements in stereological technology.

Reverse seeding of recurrent intraspinal malignant meningioma.

Meningiomas are common intracranial and intraspinal tumors and constitute 15-20% of all primary brain tumors. Ten to 15% of all meningiomas are considered malignant. The main treatment of meningiomas is surgical resection.