Blue nevi may be divided into the following types: • A
patch blue nevus (also known as an "acquired dermal melanocytosis", and "dermal melanocyte hamartoma") is a cutaneous condition characterized by a diffusely gray-blue area that may have superimposed darker macules. • A
blue nevus of Jadassohn–Tièche (also known as a "common blue nevus", and "nevus ceruleus") is a cutaneous condition characterized by a steel-blue
papule or nodule. • A
cellular blue nevus is a cutaneous condition characterized by large, firm, blue or blue-black nodules. • An
epithelioid blue nevus is a cutaneous condition most commonly seen in patients with the
Carney complex. • A
deep penetrating nevus is a type of benign melanocytic skin tumor characterized, as its name suggests, by penetration into the deep
dermis and/or subcutis. Smudged chromatic is a typical finding. In some cases mitotic figures or atypical melanocytic cytology are seen, potentially mimicking a melanoma. Evaluation by an expert skin
pathologist is advisable in some cases to help differentiate from invasive
melanoma. • An
amelanotic blue nevus (also known as a "hypomelanotic blue nevus") is a cutaneous condition characterized by mild
atypia and
pleomorphism. • A
malignant blue nevus is a cutaneous condition characterized by a sheet-like growth pattern,
mitoses,
necrosis, and cellular
atypia. blue nevus - intermed mag.jpg|
Micrograph of a blue nevus showing the characteristic pigmented
melanocytes between bundles of
collagen.
H&E stain SkinTumors-408.jpg|Blue nevus SkinTumors-415.jpg|Cellular blue nevus SkinTumors-456.jpg|Epithelioid blue nevus Skin Tumors-P6231211.jpg|Malignant blue nevus == See also ==