They can be the first step on the road to squamous cell carcinoma, and some experts even consider them the earliest form of SCC. From two to ten percent of untreated actinic keratoses (AKs) advance to squamous cell carcinoma, sometimes with two years, according to different studies.
Obi-Wan Ben Kenobi is a fictional character in the Star Wars universe, portrayed by Alec Guinness and Ewan McGregor in the films. In the original trilogy, he is a mentor to Luke Skywalker, whom he introduces to the ways of the Jedi. In the prequel trilogy, he is a master and friend to Anakin Skywalker.
Leonard Leakey Hofstadter, Ph.D., is a fictional character in the CBS television series The Big Bang Theory, in which he is portrayed by actor Johnny Galecki. Leonard is an experimental physicist, who shares an apartment with colleague and best friend Dr. Sheldon Cooper (Jim Parsons). For his portrayal, Galecki was nominated for a Primetime Emmy Award and a Golden Globe Award in 2011.