What are moles? A mole or melanocytic naevus is formed of a cluster of pigment producing cells called melanocytes. Some moles may be present from birth and we call these congenital naevi. Other common moles include Junctional Naevus These are flat moles with dark uniform pigment. The naevus cells sit at the junction of the epidermis and dermis. Dermal Naevus The naevus cells sit in dermis creating a raised domed mole often with a light brown or pink colour. Compound Naevus Naevus cells sit in dermis but also the dermo-epidermal junction creating a raised pigmented lesion Combined Naevus These have a mixed pattern of 2 different moles in one lesion. Blue Naevus The naevus cells sit deep in the dermis creating a blue tint to the pigmentation seen on the skin.