Supraorbital and Endonasal Approaches: Tailoring Surgical Techniques for Tuberculum Sellae Meningiomas Based on Preoperative Grading Systems-Minimally Invasive Approaches for Tuberculum Sellae Meningiomas.

Abstract

Tuberculum sellae meningiomas (TSMs) tend to compress the optic apparatus and an ideal surgical route, whether transcranial or endonasal, is still debated. Another issue is if the minimally invasive supraorbital (SO) approach offers the same results compared with the more invasive craniotomies. Aiming to guide approach selection, preoperative grading systems have been described.All cases of TSMs treated from 2013 to 2018 by extended endoscopic endonasal approach (EEA) or SO approach have been reviewed and classified according to three preoperative grading systems: McDermott scale, Optic Nerve Laterality Score, and Yaşargil criteria.A total of 15 patients with TSMs were treated with the EEA (n = 6) or the SO (n = 9) approach. Globally, gross total resection was obtained in 87% (n = 13) of cases and was higher with the SO (100%, n = 9) compared with the EEA (67%, n = 4). Visual function improved in all but one patient (n = 14). Compared with the EEA group, patients treated by the SO approach had larger tumors (32.3 mm vs. 24.5 mm), a higher rate of optic canal invasion (4/9 vs. 0/6), and arterial encasement (6/9 vs. 1/5). Patients with McDermott total points of 1 to 2 (7/15) were treated mainly by the EEA; all patients with McDermott total score of ≥3 (8/15) were treated by the SO approach. All patients with optic canal invasion (4/15) and lateral extension of the tumor (ONL score = 1-3) were treated by the SO approach.The SO and EEA are two minimally invasive approaches safe and effective for treating TSMs. For tumors with lateral extension (optic nerve laterality [ONL] score = 1-3), larger diameter (>30-35 mm), vascular encasement, or optic canal involvement (McDermott total point = 2-3), the SO craniotomy is preferred. For small and median tumors with no optic canal invasion or vascular encasement (McDermott total point = 1-2), the EEA represents a valid option.