Localized argyria 20-years after embedding of acupuncture needles.

We report a 66-year-old woman with localized argyria caused by embedding of acupuncture needles. Ten years after she had received acupuncture, she noticed two asymptomatic bluish macules on her right arm. A biopsied specimen from the macule revealed many brownish-black granules mainly located around the sweat glands and the blood vessels in the dermis.