[Retracted] Peritumor Edema Serves as an Independent Predictive Factor of Recurrence Patterns and Recurrence-Free Survival for High-Grade Glioma

Table 1

The interpretation principles of immunohistochemical results.

Expression level	MGMT	Ki-67	p53	IDH-l
Negative (-)	None	<5%	<5%	None
Weakly positive (+)	<10%	5-25%	5-10%	>0%
Moderate positive (++)	10-30%	26-50%	11-50%
Strongly positive (+++)	>30%	>50%	>50%

MGMT: O(6)-methylguanine-DNA methyltranferase (DNA repair enzyme); Ki-67: proliferation marker; p53: molecular marker; IDH-1: isocitrate dehydrogenase (genetic prognosis maker).