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Formation of Fibrosis After Nonablative and Ablative Fractional Laser Therapy.
MedLine Citation:
PMID:  22122738     Owner:  NLM     Status:  Publisher    
BACKGROUND: Fractional laser therapy (FLT) has become a widely accepted modality for skin rejuvenation and has also been used in various other skin diseases. OBJECTIVE: To observe long-term histologic effects of nonablative and ablative FLT in the treatment of pigment disorders. METHODS: A randomized controlled observer-blinded study was performed in 18 patients with pigment disorders. Two similar test regions were randomized to receive FLT with intermittent topical bleaching or topical bleaching alone. Patients with ashy dermatosis (AD) and postinflammatory hyperpigmentation (PIH) were treated using nonablative 1,550-nm FLT (15 mJ/microbeam, 14-20% coverage), whereas patients with Becker's nevus (BN) were treated with ablative 10,600-nm FLT (10 mJ/microbeam, 35-45% coverage) for three to five sessions. Biopsies were obtained 3 months after the last treatment. RESULTS: At follow-up, dermal fibrosis was observed in four of eight patients treated using ablative FLT and no patients treated using nonablative FLT (p < .05). CONCLUSIONS: Assuming that the dermal response is comparable in AD, PIH, and BN, at the given settings, ablative FLT may induce fibrosis, whereas treatment with nonablative FLT does not. Whether formation of fibrosis has to be regarded as dermal remodeling or a subtle subclinical form of scarring should be investigated in future research.
Bas S Wind; Arne A Meesters; Marije W Kroon; Johan F Beek; J P Wietze van der Veen; Allard C van der Wal; Jan D Bos; Albert Wolkerstorfer
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Publication Detail:
Type:  JOURNAL ARTICLE     Date:  2011-11-28
Journal Detail:
Title:  Dermatologic surgery : official publication for American Society for Dermatologic Surgery [et al.]     Volume:  -     ISSN:  1524-4725     ISO Abbreviation:  -     Publication Date:  2011 Nov 
Date Detail:
Created Date:  2011-11-29     Completed Date:  -     Revised Date:  -    
Medline Journal Info:
Nlm Unique ID:  9504371     Medline TA:  Dermatol Surg     Country:  -    
Other Details:
Languages:  ENG     Pagination:  -     Citation Subset:  -    
Copyright Information:
© 2011 by the American Society for Dermatologic Surgery, Inc. Published by Wiley Periodicals, Inc.
Netherlands Institute for Pigment Disorders; Department of Dermatology.
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