Gleolan
(GLEE-oh-lan)
A drug that contains the active ingredient aminolevulinic acid hydrochloride and is used during surgery to help find certain types of brain tumors. When Gleolan is taken up by cancer cells and then exposed to certain types of light, it becomes active and may make the cancer cells easier to see. Gleolan is a type of imaging agent and a type of photosensitizing agent.