CD93 and neoplasm: Quantification of total CD93 in the tissue lysates, using ELISA, showed a significantly 82 % higher expression in tumour tissues (mean, 7.1; standard deviation (SD), 3.33 ng/mg) compared to matched normal tissues (mean, 3.9; SD, 2.04 ng/mg) (P < 0.001) (Fig. 3).