[Endoscopic transnasal transsphenoidal surgery for pituitary tumors--intranasal procedures]

We have been performing intranasal procedures and postoperative nasal treatments in patients undergoing microscopic transseptal pituitary surgery for the past twenty years. This surgery is safe and minimally invasive and has become the standard procedure for removing pituitary adenomas. Recent advances in optical technology have increased the use of endoscopy in endonasal sinus surgery. Several methods for endoscopic transnasal pituitary surgery have been reported. Here, we report the results for 31 patients (34 operations) who were treated with endoscopic transnasal pituitary surgery. This technique enables the area of surgery to be visualized without requiring a sublabial incision or septal ablation to be performed. Five of the cases were for recurrences after microscopic surgery. A transsphenoidal surgical approach via a unilateral nasal cavity was used in 32 cases. For the remaining two cases, a transsphenoidal surgical approach via bilateral nasal cavities was used in 1 case, and a transethmoidal-transsphenoidal surgical approach via a unilateral nasal cavity was used in 1 case. Excellent results comparable to those of microscopic transseptal surgery were obtained. Endoscopic transnasal transsphenoidal surgery was found to have the following advantages: low-invasiveness, a wide and clear surgical view, and a relatively short operating time in the nose and sinus, especially for recurrent cases. This endoscopic procedure should therefore be considered as the first choice for pituitary surgery.