TREATMENT of OTA NEVUS with Q-SWITCHED ALEXANDRITA LASER of 755 NM

Negron-Beuzeville J.C.; Saco E.M.; Hernández I.P. · Revista de la Facultad de Medicina Humana (2020) · DOI: 10.25176/rfmh.v20i1.2551

Resumen

Introduction: Ota nevus is a benign dermal melanocytic hamartoma with a macular appearance, poorly defined and in a gray-black patch that generally affects the first and second branches of the trigeminal unilaterally. Objective: To evaluate the efficacy, safety and adverse events caused by the application of 755 nm Alexandrite laser for the treatment of Ota nevus. Methods: This is a series of cases with carried out between January 2017 and December 2018 on a sample of 10 patients with an average of 29 years (from 16 to 40 years old) and with a clinical diagnosis of unilateral (ON). All of them with type IV skin photo type, treated in the skin clinic. The Alex Trivantage Candela Q-switched Alexandrite 755 nm laser was used with defined energy parameters of 6 j / cm2 and 3Hz frequency and 3mm spot. All included patients signed the informed consent that includes the use of their photographic record for scientific purposes. Likewise, the study was authorized by the institutional ethics committee. Patients treated with oral retinoids, active infections or suspicious lesions of malignancy, pregnant or lactating patients and patients who did not accept informed consent were excluded. Results: The mean age was 29 years. The patients who completed the treatment did not show repigmentation in the treated lesion and the satisfaction index was acceptable. It was observed that the average of sessions to obtain favorable results varied between 8 and 10 applications. Among the most important adverse effects, post-inflammatory hyperpigmentation and the removal of the superficial layer of the post laser skin stand out. All were controlled without leaving permanent residual lesions. Conclusion: The 755 nm Alexandrite Q-switched laser is an effective technology to achieve a high degree of depigmentation in the treatment of Ota nevus and can be considered as a first-line treatment for the management of this pathology. © Iranian Academic Center for Education, Culture and Research. All rights reserved.

Instituciones: Universidad Ricardo Palma