Quiz 38: 4 year old with a rash

These are pictures of a 4 year old boy with a pruritic rash over the lower limbs, buttocks and abdomen. The two pictures were taken a few days apart. He has not had any fever or ill contacts. He has no significant past medical history but has cats as pets at home. Which of the following is most likely diagnosis?

Image courtesy of Dr. Rozhan Nabaz

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