VEGFA and cancer: Interestingly, serum VEGF levels in cancer patients tended to increaseafter four to five weeks of treatment with AZD2171 and gefitinib with a meanpretreatment VEGF level of 626 pg/ml (range from 114 to 2847 pg/ml) and a meanposttreatment level of 947 pg/ml (range from 245 to 3360 pg/ml; P = .2).