Final answer:
An intradermal melanocytic naevus is a type of mole that develops within the skin. It is characterized by the uncontrolled growth of melanocytes and appears as asymmetrical brown or black patches with uneven borders and a raised surface.
Step-by-step explanation:
An intradermal melanocytic naevus is a type of mole that develops within the skin. It is characterized by the uncontrolled growth of melanocytes, which are the pigment-producing cells in the epidermis. These moles typically appear as asymmetrical brown or black patches with uneven borders and a raised surface. They can be larger than 6 mm in diameter and may evolve or change shape over time.