which are made up of spilocytes, a type of cell derived from melanocytes.

Congenital nevi are present from birth or develop during infancy. About 1% of newborns have at least one melanocytic nevus.

Acquired moles develop during childhood, up to the first years of adult life. Few moles develop after the age of 35.

Nevi that develop or change in character after the age of 35-40 should be considered suspicious.

Clinical Dermatology