Trying to get some preliminary assessment of what possible this can be, so thanks for your opinion in advance!....My niece is 4 year old now. We spotted a little quarter-size white spot on her chest since she was 2. Now the tiny white spot has grown into a line about 4 inches long, half an inch wide spaning from the collar bone to the chest. that's the only place of the body where we've noticed discoloring on her skin. Would you please let me know what this might be, and what potentially we need to do? thanks!View Thread