Staining of tumor vasculature using a CD31 antibody (Figure 6C) revealed increased vascular proliferation in tumors in which SNAI2/Slug was overexpressed when compared to control tumors (19 +/- 4 CD31 positive vessels/hpf versus 8 +/- 1 CD31 positive vessels/hpf, P < 0.002, t-test). The gene discussed is PECAM1; the disease is neoplasm.