Botulinum toxin type-A (BT-A) for the treatment of multiple eccrine hydrocystomas.
BACKGROUND
The treatment of multiple eccrine hydrocystomas is challenging. Surgical excision is impractical. The outcomes of CO(2) and pulsed-dye laser therapy are not well studied. Botulinum toxin-A (BT-A) can block the secretions of the sweat glands and prevent dilatation of the cysts.


OBJECTIVE
To study the efficacy of BT-A on eccrine hydrocystoma.


METHODS
Eighteen patients with multiple facial eccrine hydrocystomas were treated by BT-A. The 500 IU vial of BT-A (Dysport; Ipsen Ltd, UK) was dissolved in 7.5 cc of normal saline to prepare a solution, 0.1 cc of which contains 6 IU of BT-A. Then, 0.1-0.2 ml of diluted BT-A was injected intradermally around the lesions using an insulin syringe with a 30-gauge needle. A second BT-A injection session was carried out 3-4 weeks later for four partially responsive patients.


RESULTS
Thirteen patients showed significant flattening of the lesions after the first session. The remaining partially responsive four patients showed considerable flattening after the second boosting session, performed 3-4 weeks later. The side effects were temporary and minimal. The duration of effect for the BT-A injection was 5-7 months.


CONCLUSIONS
Intradermal BT-A injection can be considered as a relatively safe and cost-effective treatment for multiple eccrine hydrocystomas.
Ebrahimi
Ali
A
Department of Dermatology, Kermanshah University of Medical Sciences, Kermanshah, Iran.
Radmanesh
Mohammad
M
D000328:Adult; D000368:Aged; D019274:Botulinum Toxins, Type A / Q000008:administration & dosage / Q000627:therapeutic use*; D003560:Cysts / Q000188:drug therapy* / Q000473:pathology*; D004439:Eccrine Glands / Q000473:pathology*; D005148:Facial Dermatoses / Q000188:drug therapy* / Q000473:pathology*; D005260:Female; D006801:Humans; D007271:Injections, Intradermal; D008297:Male; D008875:Middle Aged; D009465:Neuromuscular Agents / Q000008:administration & dosage / Q000627:therapeutic use*; D016896:Treatment Outcome
D009465:Neuromuscular Agents; D019274:Botulinum Toxins, Type A