An unusual case of temporary melanin pigmentation of the fingernails is reported following superficial irradiation therapy of a hand dermatitis.
Melanin can be differentiated from hemoglobin both chemically and microscopically.
The clinical significance of melanonychia is reviewed.
SHELLEY WB, RAWNSLEY HM, PILLSBURY DM. Postirradiation Melanonychia. Arch Dermatol. 1964;90(2):174–176. doi:10.1001/archderm.1964.01600020042009
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