Dermatologic surgery : official publication for American Society for Dermatologic Surgery [et al.] · 2010
Paradoxical hypertrichosis after laser therapy: a review.
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Desai Shraddha, Mahmoud Bassel H, Bhatia Ashish C, Hamzavi Iltefat H
Аннотация
BACKGROUND: Laser hair removal is a safe and effective procedure for the treatment of unwanted body hair but is not exempt from side effects. A rare but significant adverse effect with this treatment modality is paradoxical hypertrichosis.
OBJECTIVE: To evaluate the potential etiologies, risk factors, related laser types, and treatment options for the development of excess hair after laser therapy.
MATERIALS AND METHODS: An analysis of previously published case studies and review articles along with our own experience was used to gather information regarding this phenomenon.
RESULTS: Paradoxical hypertrichosis has a low incidence, ranging from 0.6% to 10%, and most commonly occurs on the face and neck. All laser and light sources have the potential to cause hair induction, especially in individuals with darker skin types (III-VI); with dark, thick hair; and with underlying hormonal conditions. Possible causes include the effect of inflammatory mediators and subtherapeutic thermal injury causing induction of the hair cycle. Treatment for paradoxical hypertrichosis is laser therapy of the affected area.
CONCLUSIONS: Paradoxical hypertrichosis is a rare side effect of laser hair removal; the pathogenesis of this event remains widely unknown. We recommend further large-scale studies to investigate this effect. The authors have indicated no significant interest with commercial supporters.
OBJECTIVE: To evaluate the potential etiologies, risk factors, related laser types, and treatment options for the development of excess hair after laser therapy.
MATERIALS AND METHODS: An analysis of previously published case studies and review articles along with our own experience was used to gather information regarding this phenomenon.
RESULTS: Paradoxical hypertrichosis has a low incidence, ranging from 0.6% to 10%, and most commonly occurs on the face and neck. All laser and light sources have the potential to cause hair induction, especially in individuals with darker skin types (III-VI); with dark, thick hair; and with underlying hormonal conditions. Possible causes include the effect of inflammatory mediators and subtherapeutic thermal injury causing induction of the hair cycle. Treatment for paradoxical hypertrichosis is laser therapy of the affected area.
CONCLUSIONS: Paradoxical hypertrichosis is a rare side effect of laser hair removal; the pathogenesis of this event remains widely unknown. We recommend further large-scale studies to investigate this effect. The authors have indicated no significant interest with commercial supporters.