Assessing the efficacy and safety profiles of 0.025% tretinoin in treating axillary hyperpigmentation with acanthosis nigricans: a randomized double-blinded study

Study Overview

This study looked at how effective and safe a 0.025% tretinoin cream is for treating dark skin patches (hyperpigmentation) in the armpits caused by a skin condition called acanthosis nigricans (AN).

Key Findings

  • Acanthosis nigricans causes darkening and thickening of the skin, especially in body folds like the armpits.
  • This research tested 0.025% tretinoin cream against a control cream over 12 weeks.
  • Participants applied tretinoin on one armpit and the control cream on the other.
  • After 8 weeks of treatment, results were measured using the melanin index, which tracks skin pigmentation.
  • The study involved 20 participants, with significant results showing tretinoin reduced hyperpigmentation much more than the control (p < 0.001).
  • By the end of the study, 75% of those using tretinoin reported over 75% improvement, while only 35% using the control cream saw similar results.
  • Some mild side effects were noted, such as slight redness, peeling, and itching.

Practical Solutions and Value

The findings suggest that 0.025% tretinoin cream is a safe and effective treatment for axillary hyperpigmentation linked to AN, with minimal side effects.

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