What caused this neonate's well-demarcated erosions?

Caleb, four days old, is brought in for review of two erosions measuring between 7mm and 10mm on the dorsal aspect of both hands.

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!

 

Dr Kate Kelso is a GP and medical editor at Australian Doctor.

References:
  1. Nielsen-Scott et all. Congenital blistering. BMJ 2019;367:l5287

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