Expression patterns of proliferating cell nuclear antigen in trichloroacetic acid peeled skin

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This study was designed to investigate whether trichloroacetic acid (TCA) peeling induces cellular proliferation in human skin using an immunohistochemical method. A 40% TCA peel resulted in a greater number of proliferating cell nuclear antigen (PCNA)-immunopositive cells in the whole epidermis as compared with 60% TCA or phenol peels. This finding suggests that long-term and frequent TCA peelings of low concentration would require special attention for unexpected cutaneous lesions such as skin tumors.

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