Pigmented nevi Flashcards
1
Q
What is a pigmented nevi
A
A totally benign common mole.
A NMN, nevomelanocytic nevus.
NOT a dysplastic nevus - a melanoma precursor lesion
2
Q
What are the 3 subtypes pigmented nevi
A
Junctional melanocytic NMN: These arise at
the dermal–epidermal junction, on the epidermal
side of the basement membrane; in
other words, they are intraepidermal
Compound NMN: Nevus cells invade the
papillary dermis, and nevus cell nests are
now found both intraepidermally and dermally
Dermal melanocytic NMN: These represent
the last stage of the evolution of NMN. “Dropping off” into the dermis is now completed,
and the nevus grows or remains
intradermal (Figs. 9-1B and 9-4). With progressive
age, there will be gradual fibrosis
