Cabozantinib, an oral tyrosine kinase inhibitor against MET and vascular endothelial growth factor receptor 2 (VEGFR2), is an agent that was initially met with enormous enthusiasm by the prostate cancer community. The early data showed dramatic bone scan responses, where bone metastases would almost magically disappear after cabozantinib treatment on subsequent restaging bone scans. As this was an unfamiliar, yet welcome phenomenon, the field eagerly began working on the development of this agent.
