1990 年 11 巻 Supplement 号 p. 569-572
The surgical treatment has been considered to be the first choice treatment for seborrheic keratosis and senile lentigo. It is, however, sometimes difficult to excise the big or multiple lesions simply. In these respects, the ruby laser treatment is advantageous, because it damages selectively the melanin pigments in the epidermis. In this study, the efficacy of the ruby laser radiation on seborrheic keratosis and senile lentigo using Toshiba model LRT-301A was determined. Single radiation of 9 or 16 J/cm2 has been performed for treatment of senile lentigo. On the other hand, following removal of the damaged tissue after one shot for the treatment of seborrheic keratosis radiation of 20 J/cm2, the second shot of same dosege was performed.
Twenty four cases of senile lentigo were treated and 15 cases (63%) were effective in our method. Twenty two cases (79%) out of 28 cases of seborrheic keratosis were also effective. No ulceration nor scar formation was observed in the patients after the treatment. The results revealed that the ruby laser radiationwas regarded as very safe and adequate treatment for these cutaneous lesions.