NFKB1 and neoplasm: Similar to the skin window chamber, the basal heterogeneity of tumor NF-κB trp-21anscriptional activation was only observed when using bioluminescence microscopy (Figure 7c and Figure S4a); macro imaging of Pan02 NF-κB-FLuc Dendra2 tumors in abdominal windows demonstrated the radial distribution in the signal, also seen in skin window chambers (Figure S4a, macro).