Maddy, a six-week-old infant, is brought in for review by her foster parents. They are concerned about a recurrent blistering leg rash that they believe results from minor friction.

Test your clinical know-how by taking the quiz below. If you select the wrong answer, have another go — you can try as many times as you like!

Maddy, a six-week-old infant, is brought in for review by her foster parents. They are concerned about a recurrent blistering leg rash that they believe results from minor friction. They have been the registered carers of Maddy for a fortnight; her biological parents were considered unfit to care for her by social services due to drug abuse.

She was born at 36 weeks’ gestation and spent one week in the special care nursery postpartum.