As in the other models, early stage (day 17) AT-3 tumors display strong endosialin staining on pericytes and closely associated CAFs, however, in contrast to other models which display a chaotic vasculature with immature vessels, the vascular architecture in AT-3 tumors is dominated by large well-structured vessels (figure 6A). Here, CD248 is linked to ataxia telangiectasia.