Nevus spilus is a flat brown patch within which are dots of dark brown or blackish-brown areas of hyperpigmentation (Figure 4). Histology reveals the presence of junctional or dermal nevoid cells ...

This includes dermal nevi (pictured) that match the skin color of the surrounding skin. Any changes in the color, size, or shape of a mole should be investigated. This includes changes in texture ...

Hirayama and Suzuki [13] examined the histological findings of 450 cases of nevus of Ota and classified the condition according to the distribution of the dermal melanocytes as follows ...