Abstract
113 cases involving the application of ruby laser treatment to melanin pigmented skin lesions using Toshiba model LRT-301 A ruby laser system have been studied for a 10-months period. The results of such treatment and some of its advantages compared with the results of dermabrasion, cryosurgery, and argon laser treatment are reported.1. Post operative inflammatory redness and pigmentation were extremely slight compared with the results of the conventional methods, and disappeared within a one-month period. Consequently,a period of post operative care and intervals of additional treatment were shortened.2. Superficially located pigmented lesions in the basal layer of epidermis, such as nevus spilus and senile fleck, easily disappeared after only one ruby laser treatment, without any side-effects.3. Pigmented lesions located in the upper layer of dermis, such as compound type of nevocellular nevus, incompletely disappeared after one ruby laser treatment. Two or more additional laser treatment would be required to remove these lesions completely.4. Deeply located pigmented lesions in the lower layer of dermis, such as intradermal type of nevocellular nevus and Ota's nevus, resulted in scarring or hyperpigmentation after the minimal energy irradiation of ruby laser(20 J/cm2). Because the ruby laser beam penetrated the deeply located lesions and coagulated the almost whole dermis.
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