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 ...

These locations, as well as that of the case described, are even rarer. When located on the scalp, it may be associated with the sebaceous nevus of Jadassohn. 4 Despite variable clinical presentation, ...

Histologically, there is an increase in pigmentation in the basal layer. Nevus spilus is a flat brown patch within which are dots of dark brown or blackish-brown areas of hyperpigmentation (Figure 4).