nevus of Ota

…Those found on the face and limbs are called ectopic Mongolian spots, and are less likely to disappear with age than those on the sacrum. Darker spots may not disappear even in adulthood. Nevus of Ota is a relatively common birthmark among Japanese people, and is also called oculomaxillary brown nevus. It is a bluish pigmented spot on the forehead, chin, and eyelids, with scattered brownish spots, and is often accompanied by pigmented spots on the bulbar conjunctiva, hard palate, and eardrum. …

*Some of the terminology that mentions "nevus of Ota" is listed below.

Source | Heibonsha World Encyclopedia 2nd Edition | Information

…顔面，四肢にみられるものは異所性蒙古斑と呼ばれ，仙骨部のものに比べて成長しても消えにくく，とくに色の濃いものは成人になっても消えないこともある。太田母斑nevus of Otaは日本人に比較的多いあざで，眼上顎褐青色母斑とも呼ばれる。額，あご，眼瞼部の青みを帯びた色素斑のなかに褐色調の小斑が散在性にみられるもので，しばしば眼球結膜，硬口蓋，鼓膜などの色素斑をも伴う。…

※「nevus of Ota」について言及している用語解説の一部を掲載しています。

出典｜株式会社平凡社世界大百科事典 第２版について | 情報