A retrospective analysis of the clinical efficacies of Q-switched Alexandrite and Q-switched Nd:YAG lasers in the treatment of nevus of Ota in Korean patients.

BACKGROUND: While the Q-switched Alexandrite laser (QSAL) and the Q-switched neodymium: yttrium-aluminum-garnet (QSNY) laser have been widely used in treating nevus of Ota, few studies compared them. OBJECTIVE: To compare the efficacies of the QSAL and the QSNY laser in the treatment of nevus of Ota in Korean patients. METHODS AND MATERIALS: A retrospective multicenter study was conducted in 76 patients with nevus of Ota. Thirty-one patients were treated with a QSAL (5.5-8.0 J/cm(2), 4-mm spot size) and 45 patients were treated with QSNY laser (6.0-12.0 J/cm(2), 2-mm spot size). Treatment outcomes were categorized into five grades and the results were compared with the relevant variables taken into account using multivariate logistic regression analysis. RESULTS: QSAL treatment was more likely to achieve a better response compared with that with QSNY laser treatment. The odds ratio of achieving an excellent response, compared with the odds ratio of having a poor response, was 12.213-times more likely when a QSAL was used than when a QSNY laser was used (p = 0.026). CONCLUSION: The QSAL tends to be more efficient than the QSNY laser in the treatment of nevus of Ota in Korean patients. Further controlled, prospective comparison studies are needed.

Novel photopneumatic therapy for the treatment of rosacea.

BACKGROUND: Rosacea is a common skin condition, but the currently available treatments are not satisfactory. OBJECTIVE: We wanted to assess the efficacy and safety of photopneumatic therapy (PPx), which delivers pneumatic energy and broadband light (400~1,200 nm), for the treatment of erythematotelangiectatic rosacea. METHODS: Twenty two patients with erythematotelangiectatic rosacea were treated 3~5 times with PPx. Three independent dermatologists evaluated the efficacy of PPx by comparing the photographs taken before and after treatment. Patient self-assessment was also done by interviews. RESULTS: The photographic assessment by the dermatologists of the improvement showed that >50% improvement occurred in 64% (14/22) of the patients. The specific categories of improvement were as follows: poor (<25% improvement), 1 patient; fair (25~50% improvement), 7 patients; good (50~75% improvement), 11 patients; and excellent (>75% improvement), 3 patients. Based on the patients' self-assessment, 20 patients (91%) acknowledged an improvement. CONCLUSION: PPx is an effective and safe treatment option for erythematotelangiectatic rosacea.