Re: Cafe au lait birthmark
My daughter was born with this type of birthmark on the left lateral side of her calf. She is now 15, and very happy, healthy, active, etc. I have taken her to numerous dermotologists(I was born with a birthmark and was concerned hers would change), Each dermatologist echoed the same thing: These types of birthmarks generally don't cause any problems. You just keep checking on them to make sure the skin texture or color in that area doesn't change. The research that I have done confirmed this.
The only thing you should make sure of is that this is the CORRECT diagnosis. Otherwise, it coukd be problematic, although these brown patches generally aren't misdiagnosed(as far as my research goes).
Just get a second opinion, if only to put your mind at ease.
If cosmetics is a concern, you should seek out a clinic in your area, after diagnosis, to discuss options.
My daughter loves her birthmark......she thinks it is a 'chocolate kiss' from angels.
Best of luck