In about two months, five days before Christmas, sorafenib will celebrate five years of approval by the FDA. When it was approved on December 20th, 2005, for advanced Renal Cell Carcinoma (RCC), it was the first (and is so far the only) approved drug to target B-Raf kinase, a signaling component of the MAPK pathway. Since then it has also been approved for Hepatocellular Carcinoma (HCC).