Figure 5From: The prognostic value of the hypoxia markers CA IX and GLUT 1 and the cytokines VEGF and IL 6 in head and neck squamous cell carcinoma treated by radiotherapy ± chemotherapy Correlation between CT-determined tumoral perfusion and pretreatment VEGF serum levels. There was a trend for poorer CT-determined tumoral perfusion to correlate with higher pretreatment VEGF serum levels (rS = -0.32, p = 0.06; n = 34).Back to article page