Figure 1: Low-density lipoprotein receptor (LDLR) protein expression by immunohistochemistry (magnification ×200). DAB stain (diaminobenzidine; brown colour) depicts a significant increase in LDLR expression in carcinogenic and non-carcinogenic (benign) tumours. Arrows indicate areas of higher expression. In the graph each bar shows the mean±standard deviation of 25 samples, represented as IOD (integral optical density) from the respective category. ***P<0.001 compared to sham control.