Test your diagnostic skills in our regular dermatology quiz. What is this rapidly growing nodule on the scalp of a patient who has a history of skin cancer?
An 80-year-old man presents with a four-week history of a rapidly growing nodule on his scalp (Figures 1a and b). He has noticed occasional bleeding from the lesion. The lesion is not itchy or painful. He denies unintentional weight loss, night sweats or anorexia.