One scar on the list:
Harry Potter and the Philosopher's Stone by JK RowlingRead about another scar on Mullan's list.
The lightning-flash cicatrix on Harry's forehead, evidence of Voldemort's attempt to kill him as a baby, throbs when things get dangerous. But Professor Dumbledore declines to repair it. "Scars can come in useful. I have one myself above my left knee which is a perfect map of the London Underground."