Pulsed dye laser in jellyfish-induced keloids.

Jellyfish stings can cause acute inflammatory skin lesions that may hesitate in keloids. Pulsed dye laser (PDL) represents one of the most effective treatments for newly developed keloids. Aim of this study was to evaluate the efficacy of PDL on newly developed keloids specifically induced by jellyfish stings in pediatric patients.We conducted a retrospective observational study on pediatric patients with newly developed keloids from jellyfish stings, treated in the last two years with 595 nm wavelength PDL with a duration of 0.45-1.5 msec, spot-size 7 mm and fluence 8.5-9.5 J/cm². PDL therapy was administered for a mean of 7.4 treatment sessions, every 1-3 months. Two expert dermatologists evaluated the vascularity, pigmentation, height, and pliability of keloids, according to the Vancouver Scar Scale (VSS), pre-and-post treatment. A total of 17 patients (7 males, 10 females) were included in the study, mean age of 11 years. Overall, mean pre-treatment global VSS was 11.0 ± 1.50. After treatment, global VSS was 3.88 ± 1.87. At paired t-test, the difference between pre-treatment and post-treatment was highly statistically significant (p < .0001). Commonly, manipulation and therapeutic intervention on jellyfish scars and keloids is feared. The present study supports the use of PDL in keloids secondary to jellyfish stings, though conducted on a limited number of patients.