摘要

Objectives: Nevus of Ota (Oculodermal melanocytosis) is a dermal melanocytic hamartoma that presents in childhood or at adolescence as bluish/slate gray hyperpigmentation along the first or second branch of trigeminal nerve. The pigmentation progressively increases in size and color till puberty. To understand the presentation, prognosis and treatment of Nevus of Ota. Also how to deal with some difficult situations in this condition. Will be introducing some additional maneuvers to hasten the clearance of pigment in nevus of ota patients. Introduction: Laser technology – Wonder of present-day therapeutics. Tremendous advances have happened since Ruby Laser was used for the first time. Goldman in 1960s used a Q-switched ruby laser (50-microsecond pulse duration) and found that the damage threshold of pigmented lesions was independent of skin color. Q-switched Nd:YAG laser (QSNYL) has been used successfully to treat nevus of Ota lesions. Most of the patients do well However, there are some cases that pose challenges Materials / method: In some of the cases of Nevus of OTA we changed the parameters and tried 2 additions 1. We did multiple passes using different spot sizes 2. We added a pass of fractional CO2 to add to the effect Different spot sizes ensured targeting the pigment at different levels in the skin considering that the spot size determines the depth of penetration. Also the addition of a pass of fractional CO2 created channels for transepidermal elimination of pigment, adding to the final outcome Results: By addition of these 2 parameters we could clear even the most resistant cases of nevus of ota with almost 90 to 100% clearance of pigmentation Conclusion: Several pigment-specific lasers can effectively treat epidermal and dermal pigmented lesions. Lasers are most effective in treating epidermal pigmented lesions (eg, lentigines, ephelides). Nevus of Ota is unique amongst the pigmented dermal lesions in that near-total clearance is often seen after laser treatment. QS Lasers are the treatment of choice for the treatment of NOO The addition of CO2 fractional laser pass and mutiple spot sizes of QSL helps clear the pigment faster and more effectively