To the Editor.
—Reports of plaque-type blue nevi are rare. Three new cases of plaque-type blue nevi are presented. Dermatologists need to be alerted to this lesion and advised on its management.
—After our index case was found to have a plaque-type blue nevus, the files of the Pigmented Lesion Group (PLG) of the University of Pennsylvania, Philadelphia, were reviewed for other cases of plaque-type blue nevi. We arbitrarily define a blue nevus as being plaque-type when it is palpable, at least 10 mm in diameter, and demonstrates dermal dendritic melanocytes, melanophages, and fibrosis histologically. Two cases from the PLG fit our criteria.
Report of a Case.
—14-year-old white girl presented with a his of a congenital blue lesion on her left leg that had become ''puffy,'' with parts of it becoming progressively darker during the previous year. Physical examination revealed a 2 × 2.5-cm blue plaque on the
Heymann WR, Yablonsky TM. Congenital Appearance of Plaque-Type Blue Nevi. Arch Dermatol. 1991;127(4):587. doi:10.1001/archderm.1991.04510010155028