Canonical Wnt pathway activation in DSRCT. (A) Scatterplot of fold differences in expression of Wnt-pathway genes in five DSRCT tumors compared to fibroblast control. Lines represent no change in gene expression in DSRCT samples compared to fibroblast controls and these genes are represented by the black symbols. Genes to the left of these lines (red symbols) represent Wnt-pathway genes that are up-regulated in DSRCT samples compared to fibroblast controls while those to the right (green symbols) represent genes that are down-regulated in DSRCT compared to fibroblast controls. (B) Representative images of three samples (Tumors 1–3) of DSRCT stained with antibody for β-catenin. Negative antibody controls are shown. Red arrows indicate examples of cells with nuclear reactivity, consistent with canonical Wnt-pathway activation.