Blue nevi arise from active dermal melanocytes present at birth, ... or if a melanoma or other skin cancer is to be ruled out based on the clinical appearance, or if they are very unsightly.

Benign (non-cancerous) moles tend to be symmetrical. If you were to place an imaginary mirror in a line in the middle of the mole, it should be the same on either side. Remember, all moles are ...

They appear on the face—usually on the nose but also on the cheeks, chin, lips, neck, or forehead. No predilection has been found based on race or sex, ... intradermal nevus, and dermatofibroma.

Nevi of genital skin, acral skin, and flexural skin are among the most important ‘nevi of special sites’. ... mature dermal nevi. Such lesions may on occasion spontaneously infarct.

Under electron microscopy, the dermal melanocytes from nevus of Ota contain many single dispersed melanosomes that are usually fully melanized. Basal lamina and lamina lucida can be found around ...

Other dermal melanoses can usually be easily distinguished from nevus of Ota. Mongolian spot and nevus of Ito are located in different sites. There are four types of blue nevus: 1) common; 2 ...