The treatment settings for the pulsed dye laser were a 10-12 mm spot size delivered at a fluence of 6.5-9 J/cm2 in a pulse duration of 0.45-1.5 milliseconds. The average age at the time of first treatment was 3.4 months (range, 5-355 days), and the average number of treatments was 9.8 (range, 2-23). Most of the patients (116) were aged 0-3 months at the time of first treatment, followed by 51 aged 3-6 months, 19 aged 6-9 months, and 11 aged 9-12 months.
According to the averaged scores on the visual analogue scale assigned by physicians, 27.4% showed a 100% clearance, 39.1% showed 76%-99% improvement, 15.1% showed 51%-75% improvement, 10.7% showed 26%-50% improvement, and 7.7% showed 0%-25% improvement. No scarring or pigmentary changes were observed.
An analysis of dermatomal distribution revealed that the presence of a V1 lesion was a statistically significant predictor of a higher clearance rate, while the presence of a V3 lesion was a statistically significant predictor of a low clearance rate. “Regardless of where the lesion was, all patients did well,” she said.
Given the small proportion of patients who received their first treatment between the ages of 6 and 12 months of age, Dr. Jeon said that “further studies would be needed to elucidate whether earlier intervention helps to achieve better results.”*