It is called Vizilite. You can read about it in my blog here http://www.surviving-oral-cancer.com/2008/03/deciding-on-your-treament-plan.html Thy ADA is still awaiting more documentation from them before approving it.

Stage 4A SSC Left Tonsil, back of tongue and Lymph nodes on left side. Tonsil removed, Chemo and Radiation treatments completed on June 26, 2008.