(ABC News) The reddish-purple rash, seemingly woven into the tattoo on a 20-year-old New Yorker's forearm, was strange enough to have doctors scratching their heads.
This trail began when the man received a tattoo in Rochester, N.Y. in October 2011. A short while later, he noticed the raised, bumpy rash. He called his primary care physician.
Doctors initially treated the man's arm with topical steroids, thinking that the rash was allergic-contact dermatitis. But that only made the problem worse.
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By the time dermatologist Dr. Mark Goldgeier saw the patient, it was clear that this was no simple allergy.