A 36-year-old woman at 12 weeks of pregnancy with a personal
history of severe atopic dermatitis presented to the ED with a
widespread and painful skin eruption. On physical examination,
there were clusters of monomorphic blisters and crusts (see figures
1 and 2).
Fig 1. Widespread and painful skin eruption
Fig 2. Clusters of monomorphic blisters and crusts
Laboratory tests were within normal range.
Which of the following is the most likely diagnosis?