Quality of Life and Stigmatization in Children With Congenital Melanocytic Nevi Before and After Nevus Excision

This trial is studying how having a large birthmark (called a congenital melanocytic nevus) affects children's quality of life and whether they feel stigmatized, both before and after having the birthmark surgically removed. **You may be eligible if...** - Your child has a congenital melanocytic nevus (a type of large birthmark) that is at least 2 cm² in size - The birthmark is scheduled to be surgically removed - Your child is between 9 months and 16 years old **You may NOT be eligible if...** - Your child has an intellectual disability - Neither parent has sufficient knowledge of German - Your child has serious other health conditions - Previous treatments for the birthmark have already been done (such as laser, dermabrasion, or prior surgery) Talk to your doctor to see if this trial is right for you.