Table 2.

Typical distribution, age of onset, and clinical course of dermal melanocytoses

	Typical distribution	Onset	Course
Mongolian spots (MS)	Lower back and sacrococcygeal region	Congenital or early childhood	Pronounced at the age of 1 and 2, typically disappears until the age of 6 years
Nevus of Ito	Shoulder area in the distribution of the posterior supraclavicular and lateral cutaneous brachial nerves	Congenital or around puberty	Persistent
Nevus of Ota	Skin, ocular, and oral mucosal surfaces in the distribution of the ophthalmic and maxillary branches of the trigeminal nerve	Congenital or around puberty	Persistent
Melanocyte hamartoma	Dermatomal distribution	Congenital	Persistent