The Efficacy Tretinoin Cream in the Treatment of Axillary Hyperpigmentation Associated With Acanthosis Nigricans

The goal of this randomized intra-individual design with a split-side axillary approach is to comparing the efficacy of 0.025% tretinoin cream against a cream-based formulation in the treatment of axillary hyperpigmentation associated with acanthosis nigricans. The main questions it aims to answer are: * The efficacy of 0.025% tretinoin cream and cream based in the treatment of axillary hyperpigmentation associated with acanthosis nigricans. * The safety of 0.025% tretinoin cream and cream based in the treatment of axillary hyperpigmentation associated with acanthosis nigricans. Participants were randomly assigned to apply both 0.025% tretinoin cream and the cream-based product on opposing sides of the axillary region.

This study employed a randomized intra-individual design with a split-side axillary approach, comparing the efficacy of 0.025% tretinoin cream against a cream-based formulation. Participants were randomly assigned to apply both 0.025% tretinoin cream and the cream-based product on opposing sides of the axillary region. The efficacy of treatment was assessed by Mexameter (melanin index). The investigator's global evaluation (IGE) and parent's global evaluation (PGE) were also used to evaluate the overall success rate. The local safety was conducted for assessment of any cutaneous irritation. At each visit, the investigator graded the degrees of erythema, dryness, peeling, burning, and itching using a scale of 0 to 4. This study was followed for 4 visits, at the baseline, at week 2, 4 and 8.