I do know that sometimes they can be removed. Dr. Waner has offered this option on specific cases. But, i would say typically surgery is not an option. It wouldn't hurt to ask though.
It also is possible that your child might require a different laser? Contact Dr. Nelson about what options are available in treating her PWS. He used 2 different lasers on my son. He customizes treatment to each PWS.
You can contact him via ask the expert on the home page of this site.
Good luck and keep us posted.
VBF Director of Family Services
vbfadvocate @ live. com (no spaces)