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Background: There are several commercially available agents to treat female pattern hair loss (FPHL), including minoxidil solution, anti-androgen agents and mineral supplements. However, these treatments are not always satisfactory. We report the results of a clinical trial of 17α-estradiol (Ell-CranellⓇ alpha 0.025%) solution to Korean female patients with FPHL. Objective: This study was designed to examine the efficacy and safety of Ell-CranellⓇ alpha 0.025%solution in Korean female patients with FPHL. Methods: A total of 53 women, 18 to 55 years old, applied topical Ell-CranellⓇ alpha 0.025% solution once daily for 8 months. Efficacy was evaluated by the change of hair counts and diameter, subjective assessment, and photographic assessment by investigators. Results: Hair counts and diameter from baseline to 4 and 8 months after treatment increased in treated patients and these changes were statistically significant (p＜0.0001). 17α-estradiol (Ell-CranellⓇ alpha 0.025%)solution showed significant improvement by subjective selfassessment and by investigator photographic assessment. Ell-CranellⓇ alpha 0.025% solution was well tolerated over 8-months period. Conclusion: This study showed that Ell-CranellⓇ alpha 0.025% solution is a safe and effective agent for Korean women with FPHL.
