Gross: a less common lesion but often
clinically similar to the common blue nevus. Tend to be
large, usually measuring 1-3 cm in diameter. Lesions are
elevated, smooth-surfaced papules or plaques that are
gray-blue to bluish black. Usually solitary and found on
the buttocks, the sacral region, and occasionally on the
dorsal aspects of the hands and the feet.
Other variants of blue nevi: epithelioid blue nevus (classic
description is with the Carney complex), atypical blue nevus,
deep penetrating blue nevus, sclerosing blue nevus, and
amelanotic blue nevus.