I found this science blog, it says "stuff for science nerds" so I knew I was in the right place. This particular entry details the role of Wnt signaling in tumors. The blog details an article where Wnt signaling was found to be hyperactive in lung tumors and correlated with increased metastasis. They also discuss a study where Wnt signaling was "active" in a certain brain tumor (CNS PNET).
The blog articles contain links to popular science media and not directly to the references.