Case 1

A 54-year-old man with a history of asthma presents to clinic in the springtime with a burning, itchy rash on his lateral neck. On physical examination an erythematous plaque with scale is noted around his entire neck.  The patient says that he has tried applying moisturizer but without relief.  Upon further questioning, the patient admits that he has been wearing a new necklace that was given to him as a gift.   

Can you diagnose the condition in Case 1?

A. Allergic contact dermatitis
B. Lichen planus
C. Psoriasis
D. Xerotic eczema

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