Figure 4: Expression of VEGFR2 and CD34 in tumor tissue.(A & B) Representative photomicrographs of (A) VEGFR2 and (B) CD34. (C & D) The percentage of positive immunohistochemical reactions (brown stained area) analysed by Image J software. C1= benzoimidazoquinazoline, C2= Benzimidazotriazine. Values are expressed as mean ± SD. The. Data were analyzed using ANOVA followed by Bonferroni post hoc test. # significantly different compared to the control group, $ significantly different compared to the cisplatin group. Differences were considered significant at p <0.05.