الفهرس 
Aim of the workOnly 14 pages are availabe for public view
 |  | from | 134 |  |  |
| | | from | 134 | | |
Abstract
The sellar region has a complex anatomical relation with multiple neurovascular structures related to it. Lesions affecting the sellar and perisellar structures are multiple, but still the pituitary adenomas are the commonest. Pituitary adenomas are benign lesions but has variable invasive potentiality or even distance metastatic behavior in its carcinomatous variant.
The sella turcica is considered the center of the skull base. Its direct relation to the sphenoid sinus made it attractive target to the transsphenoidal approach. An approach that widely limited the more traumatic transcranial approach. Both the microscopic and endoscopic tools are applicable, but the endoscopies permits angled vision and helps more lateral and posterior extension of this approach. The usual team of endoscopic transsphenoid approach includes well-trained ORL surgeon on skull base surgery with the neurosurgeon.
Preoperative evaluation of bony structures of the skull base at the sellar region is a key step for operative plaining, intraoperative accurate manipulation and by so lower rate of complications. CT is the most popular tool to achieve this goal, but its large physical volume, high radiation dose and relative higher coast gave the way to its newer advances to take its role. CBCT utilization is increasingly widened, to achieve targets of CT with smaller physical size and relatively lower radiation dose.
This prospective study was conducted in two tertiary care centers Menoufia University hospitals and Mansoura University hospitals. The study group included 24 cases (the study group), and 24 normal subjects represented the control group (the control group).