<unk>  is a hyperpigmentation that occurs on the face, most often appearing on the white of the eye. It also occurs on the forehead, nose, cheek, periorbital region, and temple. It was first reported by Masao Ōta of Japan in 1939.
Nevus of Ota
Halo nevus
Adenoma sebaceum
Onychomatricoma
Eccrine nevus
Eruptive vellus hair cyst
Trichofolliculoma
Woolly hair nevus