A 57 year-old-female is post-op day 2 from a knee replacement. Dermatology is consulted for the dermatitis seen here. It is pruritic, and has not responded to 1% hydrocortisone. What is the most likely etiology of the physical findings?

A. Allergic contact dermatitis to a soap or other topical application

B. Irritant contact dermatitis due to excessive rubbing during the cleansing process

C. Allergic contact dermatitis to the metal within the joint replacement

D. New-onset psoriasis

E. Phototoxic drug eruption to doxycycline given pre-operatively

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

Brought to you by our brand partner Derm In-Review.  A product of SanovaWorks.