History A 3-year-old girl presented with red lesion on her left ear. The lesion is entirely asymptomatic. Her parents first noticed the lesion shortly after birth and described it as having the appearance of a red ‘stain’. Shortly before her six-week check, it was beginning to enlarge and it grew until she was approximately four months old. Her mother feels it has been fairly static subsequently. The child is otherwise well; she was born at term and is fully vaccinated to date.

There is no family history of birthmarks or other skin lesions. Examination She is thriving with height and weight between the 50th and 75th centiles for her age. She has an elevated, dome-shaped, dusky red, rubbery, non-tender lesion on the dorsal aspect of the lobule of her left ear (image attached). The overlying skin is showing some patchy pallor (or greying). She has no other skin lesions. What is this red…