Abstract
Eighty-three cases of pigmented skin lesion were treated with ruby laser (Toshiba Model LRT-301 A) and the usefulness was investigated.
1) In the cases of nevus spilus, the color faded readily after only a course of irradiation and the posttreatment inflammatory redness and pigmentation were very mild, no scar formation being observed. However, a tendency of recurrence was noted.
2) In the cases of pigmented nevus, the color faded hardly after one course of irradiation and repeated additional irradiation was required.
3) In the cases of Ota's nevus, the treatment was effective for brownish lesions by not necessarily effective for bluish lesions because side effects such as scar formation appeared in some cases.
4) In the cases wich lesions are localized in epidermis (except nevus spilus), good therapeutic effect, was attained