A 49-year-old man has had intermittent eruptions of itchy blisters on both of his palms for the past 15 years. The lesions heal after 2 to 3 weeks and then occur again after 6 months. He suspects that they are caused by poison ivy, but he is unsure of where he would have been exposed to the plant.
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The patient is a military pilot. He takes no medications and has no other rashes.
What is your clinical impression?
A. Contact dermatitis.
B. Erythema multiforme.
C. Psoriasis.
D. Lichen planus.
E. Dyshidrosis.
Bonus question: What additional history might be relevant?
