Congenital nevomelanocytic nevus; “split” of the eyelid. A sharply demarcated, brown plaque, involving the upper and lower eyelids in a 45-year-old Asian female. Nevomelanocytes migrate from the neural crest to the skin after the 10th week in utero but before 24 weeks when splitting of eyelids occurs.
Fitzpatrick’s Color Atlas & Synopsis
of Clinical Dermatology
Klaus Wolff, Richard Allen Johnson, Dick Suurmond
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