TABLE 3.

Summary of Preoperative and Postoperative MRI Status and Postresection NIR Fluorescence Status

Cavernous sinus invasion	GTR (n)	GTR (%)	FRα-overexpressing	Residual neoplasm predicted by NIR	Clinically significant tumor
Knosp grade (n)			adenomas (n)	in FRα-overexpressing patients (%)a	recurrenceb (%)
0 (2)	2	100	1	100	0
1 (5)	4	80	3	100	0
2 (3)	1	33	2	100	0
3 (2)	1	50	1	100	0
4 (2)	0	0	2	0	50%

FRα = folate receptor alpha; GTR = gross total resection; MRI = magnetic resonance imaging.

^aPostoperative MRI from day 1, 2-mo, and 6- to 12-mo follow-up visits were used. If postoperative day 1 MRI was inconclusive regarding residual neoplasm, a later-date MRI was used.

^bDefined as recurrence needing repeat treatment or causing new symptoms at 1-yr follow-up.