Comparison of the effectiveness of fractional 1550-nm erbium fiber laser and 0.05% tretinoin cream in the treatment of acanthosis nigricans: a prospective, randomized, controlled trial.

Acanthosis nigricans is a common dermatological problem. There are currently limited clinical trials to determine the efficacy and safety of laser treatments. To compare the efficacy of fractional 1550-nm erbium fiber laser versus 0.