Sellar reconstruction algorithm in endoscopic transsphenoidal pituitary surgery: experience with 240 cases.

Background: Proposing a strategy for sellar reconstruction in endoscopic transsphenoidal transsellar approachfor pituitary adenoma.

Methods: 240 patients with pituitary adenoma underwent pure endoscopic endonasal transsphenoidal surgery.Intra-operative CSF leaks were classified as grade 0, no observable leak; grade 1, CSF dripping through anarachnoid membrane defect of less than 1 mm; and grade 2, CSF flowing through an arachnoid defect of morethan 1 mm.