Nevus of Ota

Conception

Nevus of Ota, initially described by Dr. M. T.Ota of Japan, is a benign cutaneous condition and is within the distribution of the sclera and trigeminal nerve.

Clinical feature

1. Blue, brown, black
2. 1-10mm in diameter or larger;
3. Almost not elevated on the skin, has no symptom and no self healing tendency.
4. No relation with season and sunshine;
5. About 50% of nevus of Ota cases are acquired and mostly occurred during adolescence; the other 50% are congenital and occur most frequently in Female.

Histopathology

Nevus of Ota is caused by abnormally increased dermal melanocyte which contains a large number of melanin.

Method of treatment

Because Nevus of Ota is a dermal melanocytic lesion, so Q-Switched ND:YAG laser is the first choice.