Bowen's disease is a precancerous form of SCC sometimes referred to as squamous cell carcinoma in situ. It develops slowly and is easily treated. The main sign is a red, scaly patch on the skin that may itch. It most commonly affects elderly women and is often found on the lower leg.
Noelle and Cali aren't the only twins to have played one child character in Friends. Double vision: Ross' cheeky son Ben (pictured), from his first marriage to Carol, was also played by twins, Dylan and Cole Sprouse, who are now 22.
Before Friends (1994), David competed against his high school friend Jonathan Silverman and actor Jon Cryer for a role in the TV pilot for Couples. Jonathan won the role opposite Helen Slater, but ABC passed on the show. The producers later reconceived the show for singles and sold it to NBC as Friends (1994). David was the first actor to be cast.