alexa Histologic study of depressed acne scars treated with serial high-concentration (95\%) trichloroacetic acid.
Dermatology

Dermatology

Journal of Clinical & Experimental Dermatology Research

Author(s): Yug A, Lane JE, Howard MS, Kent DE

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Abstract BACKGROUND: Acne scarring is a common manifestation that remains a therapeutic challenge to dermatologists, dermatologic surgeons, and plastic surgeons. Although multiple therapeutic modalities exist, treatment often remains inadequate. The use of high-concentration (95\%) trichloroacetic acid (TCA) applied focally to atrophic acne scars has been described. OBJECTIVE: The current study confirms the utility of focal application of 95\% TCA to acne scars in addition to a histologic examination of this technique. METHODS: Acne scars in three patients were treated with focal 95\% TCA by serial application. Wooden applicators were used to apply TCA focally and repeated at 6-week intervals for a total of six treatments. Punch biopsies were performed at baseline and at 1 year postoperatively. Histologic examination was performed with routine hematoxylin/eosin, Masson trichrome, and Verhoeff-van Gieson staining. RESULTS: Clinical examination revealed apparent cosmetic improvement in both depth and appearance of acne scars. Patient satisfaction was high. Histologic examination demonstrated a decrease in the depth of acne scars. In addition, increased collagen fibers and fragmentation of elastic fibers were noted. There were no complications from the procedure. CONCLUSION: Focal application of high-concentration TCA to atrophic and "ice-pick" acne scars appears to produce clinical improvement. Histologic changes of this technique are described. This article was published in Dermatol Surg and referenced in Journal of Clinical & Experimental Dermatology Research

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