Management of Calvarial Tumors: A Retrospective Analysis and Literature Review.

Aim: Tumors of various organs that metastasize to bone do not neglect calvarium as a target. The aim of this study was to characterize the calvarial tumors.

Material And Methods: We retrospectively reviewed 45 consecutive patients operated for calvarial masses from January 2002 till May 2012 at our hospital.

"Extarterectomy" for tumors invading the carotid artery: an animal model.

Objective: Carotid artery (CA) invasion by head and neck tumors is a challenging problem for the cranial base surgeon. Proposed methods for management have the disadvantage of constant or temporary interruption of the arterial blood flow and, as a consequence, cerebral ischemic complications. The objective of the study was to investigate the long-term effects of a novel technique, "extarterectomy," on the vascular wall and the arterial blood flow in an ovine model.

HIV related toxoplasmic encephalitis mimicking multiple metastasis: case report.

We report a case of toxoplasmic encephalitis (TE) in a young woman without prior history of human immunodeficiency virus (HIV) infection. She was referred to our clinic with a diagnosis of multiple metastases following cerebral magnetic resonance imaging (MRI) revealing multiple ring-enhanced mass lesions. She had suffered from headaches for four weeks and there had been new onset of confusion and left hemiparesis.

Facial nerve neuroma: clinical, diagnostic, and surgical features.

Facial nerve neuromas are uncommon benign tumors. The diversity of tumor locations and their proximity to vital neurovascular structures create a variety of clinical situations, and the management strategy for each case differs. Two cases with tumors located at different sites and associated with different clinical presentations are discussed in terms of diagnosis and management.

Spinal meningeal melanocytoma. Report of two cases and review of the literature.

The authors report on two patients with spinal meningeal melanocytoma and review the literature on this lesion. One case is particularly interesting because of the lesion's thoracic intramedullary localization. Meningeal melanocytoma is a benign but locally aggressive lesion and is very rarely associated with spinal localizations.

'The columellotomy modification' of transseptal hypophysectomy.

Objective: Although the transseptal approach to the sella turcica is the most common method by which the pituitary tumors are resected, it is not suitable for the noses with narrow nostrils, precluding the placement of the neurosurgical speculum. In this paper, as a solution for this problem, 'the columellotomy modification' of the transseptal approach is suggested and described together with the results in five patients.

Methods: In five patients, the distance between the outer edges of the two blades of the neurosurgical speculum was measured after positioning the neurosurgical speculum through the hemitransfixion incision, and after positioning the neurosurgical speculum through 'the columellotomy' incision.