The clinical differential diagnosis for NS includes seborrheic keratosis, congenital nevus
, and epidermal nevus.
Kissing nevus of eyelid is a rare form of congenital nevus
which occurs on adjacent parts of upper and lower eyelid in such a manner that it appears as a single large nevus when eyelids are apposed together.
The literature does not show any satisfactory form of treatment for congenital nevus
of such dimensions.
As a congenital nevus
, NS can be classified into three distinct clinical types (1, 2); small if it is less than 1.
Yosipovitch G, Feinmesser M, Mutalik S: Poliosis associated with a giant congenital nevus
Pseudomelanoma following laser therapy for congenital nevus
Certain lesions are said to be precursor lesions of melanoma, including the common acquired nevus, dysplastic nevus, congenital nevus
and cellular blue nevus (19).
A third type, the congenital nevus
, is one that was present at birth, is completely elevated, has separate borders, but has stippled pigmentation (dots of darker color scattered throughout).
When a congenital nevus
is more than eight inches in diameter, it poses the greatest risk.
Fast forward 15 years and ask a teen with a large (but not giant) hairy congenital nevus
if she wants it off.