If she has, good for her. It is a private matter either way, so I can see why they wouldn't talk about it if she has. I know you were in no way asking to know or thinking we should know, so I'm just stating the following for a general tidbit: nobody's, whether they are famous or not, personal medical information/history is any of our business. If they choose to share it, they generally have a good reason, such as bringing awareness to the issue (like cancer or drug/alcohol addiction).
Or, in one case, totally grossing their audience out showing a hair transplant operation in exchange for "free advertising".

(Did that episode creep anybody else out?!?! Why did they have to show his head?! Did they think that would really sell ppl on the idea, "Hey, I should get a hair transplant, too!" That would sooooo make me NOT want to do it!)
Don't forget about the body paint/body chocolate fun at the vacation house!