Abstract
Nevus spilus is known to have a high recurrence rate against the various treatments.
To minimize recurrence rate of the nevus, treatment was performed using a normal-pulsed ruby laser system (dual pulse width: 240μsec.~1msec.) as well as a Q-switched ruby laser system (pulse width: 30 nsec.). We treated the patients with nevus spilus using our protocol as indicated below.
After the epidermis on the treated area had been completely removed using long pulse of normal-pulsed ruby laser, the additional irradiation of short pulse with normal-pulsed ruby laser was performed and additional treatment with Q-switched ruby laser treatment to whom the recurrence rate seems to be high. The protocol was further improved with additional laser treatment using short pulse of 10J/cm2 and Q-switched ruby laser treatment of 4-7J/cm2, 3 weeks after the first treatment even there is no visible recurrence on the treated area. We consider that at least 2 sessions of the treatment with our protocol are needed for establishing good results. The efficacy of ruby laser treatment on nevus spilus was judged as excellent of good in 69 out of 97 cases (71.1%), and which has tendency to be improved as increasing treatment sessions. The side effects such as darkening of the lesion, ulceration, scar formation, or longstanding depigmentation were not observed.
