VTN and neoplasm: Laminin and vitronectin gene expression in the Cavalli data set (supplementary material, Figures S4, S5, and S7) and protein expression in the TMAs (Figure 3) show that there are different combinations of LAM/VTN (high/low, low/low, high/high, low/high) that present to varying degrees in the MB subgroups, indicating that the ECM is a key candidate for the different tumour phenotypes regarding adhesion, invasion, and migration.