A<unk>  is a type of coloured mole, typically a single well-defined<unk> -black bump. The<unk>  colour is caused by the pigment being deep in the skin. Diagnosis is by visualisation and dermoscopy. A biopsy is sometimes performed, or the whole lesion surgically removed. The outcome is generally good but there is a small chance of cancerous transformation. Differential diagnosis includes dermatofibroma and melanoma.<unk>  nevi are more common in females than males. It was first studied in 1906 by Tièche, a student of Josef Jadassohn.
Blue nevus
Melanoma
Woolly hair nevus
Dermatofibroma
Spitz nevus
Ink spot lentigo
Acral nevus
Halo nevus