SUCCESSFUL TREATMENT OF NEVUS OF OTA BY QS ALEXANDRITE LASERS (755 nm)

Abstract

Nevus of Ota is a facial congenital pigmentation disorder affecting mainly the face. Nowadays, different types of pigmentation lasers have been used to treat Nevus of Ota. Very few research to address the treatment results have been performed in Vietnam. Objective: To evaluate the clinical efficacy of Qs Alexandrite lasers in treatment of Nevus of Ota in Vietnamese people. Method: 35 patients with Nevus of Ota were treated by 8 sessions of Qs Alexandrite laser 755 nm at monthly intervals. Clinical improvement was evaluated based on color of the Nevus of Ota before, during and after treatment. Results: The color of Nevus
of Ota gradually improved after 2, 4, 6, 8 sessions. After 8 sessions of treatment, excellent improvement accounted for 45,7%, and there was no case of slight improvement. 100% brown nevus achieved excellent improvement, while dark blue nevus improved 35,7%. Only 29% Nevus of Ota at the eyelids was found with hyperpigmentation after treatment. 94,2% patients were satisfied with the treatment. Conclusion: The laser targets in Nevus of Ota are melanocytes and dermal melanosomes. After treatment, the skin structure returns to normal appearance.