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CLINICAL CHARACTERISTICS AND RESULTS OF LENTIGO TREATMENT WITH ND:YAG PICO-SECOND LASER 532NM WAVELENGTH AT HANOI DERMATOLOGY HOSPITAL
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Abstract
Objective: Describe clinical characteristics and evaluate the effectiveness of treating actinic keratosis with 532nm ND:YAG picosecond laser at Hanoi Dermatology Hospital from July 2019 to July 2020. Subjects and methods: A cross-sectional description of clinical characteristics of 91 patients actinic keratosis and controlled clinical trial treating lesions for 30 patients/group with Nd: YAG-KTP picosecond laser. Evaluation of color, area, side effects, and recurrence time was based on examination and comparison of photos before and after treatment at 4 weeks and 8 weeks. Results: The average age of the patients was 51.21 ± 11.56 years old, with lesions appearing in the 40-49 age group. The male/female ratio was approximately 7/1. The most common location is the cheek area accounting for 86.8%, the lesion color is mainly dark brown 54.9%, the lesion color darkens with age 89.0% and the size increases over time 85.7%. Related to patients using sunscreen incorrectly is 54.9%. Regarding the level of color improvement, after 4 weeks of treatment, the rate of patients responding very well or better is only 43.3%, increasing to 93.3% after 8 weeks. Regarding the level of area improvement, after 4 weeks of treatment, the rate of patients responding very well or better is 43.3%, rising to 90.0% after 8 weeks. After one treatment, patients mainly experienced hyperpigmentation (33.3%), but in the second treatment, only one patient did. Conclusion: Treatment of actinic keratosis with a Nd: YAG-KTP picosecond laser shows good results with few side effects.
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Keywords
Picosecond Nd:YAG-KTP laser, solar lentigo
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