What is a Nevus of Ito?
A variant of Nevus of Ota. It occurs over the shoulder and neck region in the distribution of the posterior supraclavicular and lateral cutaneous brachial nerves. It is otherwise clinically and histopathologically similar to Nevus of Ota.

References:
Benign pigmented skin lesions other than melanocytic nevi (moles). www.uptodate.com
Image obtained from: http://www.meddean.luc.edu/lumen/MedEd/medicine/dermatology/melton/nevusota1.jpg