A father brings in his child who has a history of atopic dermatitis.  He reports a one-week history of blisters on the extremities and states this looks different than his usual eczema. The child is well appearing and happily cooperative with your exam.  What is the next step in management?

A. Scabies prep

B. Wound culture

C. Tzanck smear

D. Potassium hydroxide prep

E. Punch biopsy

To find out the correct answer and read the explanation, click here. 

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