Efficacy of Type A Botulinum Toxin Treatment for Androgenetic Alopecia
Objective
This study aimed to assess the efficacy of type A botulinum toxin treatment for androgenetic alopecia (AGA) using a combination of ultrasound and trichoscopy.
Methods
Ninety patients with AGA were selected and received injections of type A botulinum toxin or a control agent. Ultrasound and trichoscopy were used to compare the differences in various parameters at the injection sites before treatment, and 1 month and 3 months after treatment.
Results
The patients in the botulinum toxin group showed wider and longer average follicle width and length at the vertex and left frontal area compared to the control group. The changes in follicles were detected earlier than the changes in hair count using ultrasound.
Conclusions
Follicle width and length are effective parameters for evaluating the efficacy of type A botulinum toxin treatment for AGA. Ultrasound combined with trichoscopy provided more parameters for evaluating the efficacy of the treatment, resulting in a more comprehensive evaluation.
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