Test your diagnostic skills in our regular dermatology quiz. What is the cause of this child’s pruritic rash?
A 10-year-old girl presents with a six- month history of an intensely pruritic rash mainly over the extensor surfaces of her lower legs and arms. She is otherwise well. Six years previously she had been referred to a dermatologist for management of atopic dermatitis, and then discharged to the care of her GP.