Table 12.

Series of meningiomas and respective percentages of COX-2 expression.

Authors, year, country	COX-2 %	Observations
Current paper	100.0	96 grade I
Ragel et al., 2005, USA (112)	87.0 grade I	128 grade I. 86% in 7 grade II, in cell cultures
Buccoliero et al., 2007, Italy (35)	83.0	23 meningiomas of all grades
Pistolesi et al., 2007, Italy (111)	82.14	46 grade I, 8 grade II and 2 grade III. Higher COX-2 in higher grades
Lee et al., 2014, South Korea (72)	12.2 grade I	49 grade I, 33 grade II (COX-2, 12.1%), 6 grade III (COX-2, 16.6%). Total of 88 cases.
Kato et al., 2014, Japan (39)	59.1 grade I	44 grade I.

COX-2, cyclooxygenase 2.