Table 1.

The scoring system for tuberculum sellae meningioma [8].

Tumor Score
1	Less than 16.9 mm
2	Greater/equal 16.9 mm
Canal Score
0	No invasion or (≤3 mm)
1	Unilateral invasion > 3 mm
2	Bilateral invasion > 3 mm
Artery Score
0	It abuts the medial wall only
1	Envelops < 180° around the artery
2	Encases ≥ 180° around the artery