Argyria mimicking a blue nevis: dermoscopy features*
نویسندگان
چکیده
Argyria is a rare disease caused by prolonged skin contact with silver. Localized cases have been described regarding the use of topical medications, and trauma with objects containing this metal such as acupuncture needles and jewelry. Clinically, a macule or a patch, round or oval, appears in the infected area, with a characteristic bluey-gray color. To our knowledge this is the first time that this clinical condition has been described through the use of dermoscopy.
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that resembles chains of streptococci. Under polarized light microscopy, the metallic granules are brilliantly refractile and produce the characteristic ‘‘starry sky’’ image. In chrysiasis (gold deposits in tissue), the granules are typically larger and present red-orange birefringence. Bismuth deposits are positive on Christeller-Komaya staining. The definitive diagnosis is made using electron...
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