This revealed a network of endothelial vasculature (yellow) (Fig 1A) that was co-labelled with lectin (magenta) (Fig 1A) and numerous CD31-negative, lectin-positive channels which we identified as vasculogenic mimics (Fig 1A), appearing throughout the tumor but enriched in peri-necrotic regions. The gene discussed is PECAM1; the disease is neoplasm.