exogenous pigmentation

ex·og·e·nous pig·men·ta·tion

discoloration of the skin or tissues by a pigment introduced from without.
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References in periodicals archive ?
Discordant results included exogenous pigmentation, a pigmented basal cell carcinoma, and two benign melanocytic nevi.
Exogenous pigmentation is commonly due to implantation of foreign-body in the oral mucosa.
The aim of this study is to report exogenous pigmentation (chromatosis) of the carcass and viscera of sheep in the state of Bahia, Northeastern Brazil.