The effects of a single dose of 5-fluorouracil on keloid scars: a clinical trial of timed wound irrigation after extralesional excision

Plastic and Reconstructive Surgery
R S UppalA D McGrouther

Abstract

The possibility of altering the pathophysiology of keloid scars was investigated in 11 patients, using a single application of 5-fluorouracil solution for 5 minutes after extralesional excision was performed. Similar excisional wounds treated with phosphate-buffered saline for 5 minutes served as synchronous controls. An objective scoring system and subjective assessment were made to assay the change in the quality of the wound-healing and scar tissue produced by this treatment. A keloid scar score was used at regular time intervals after treatment to assess the quality of scar produced, thereby enabling the treated and control scars to be clinically compared. Biopsies were taken of the control and treated scars 1 month after treatment; the biopsy specimens were then subjected to immunohistochemical analysis as well as a functional assessment of cultured keloid fibroblasts. The immunohistochemical antigens assayed were Ki-67 (also called MIB-1; a marker of cell proliferation); vascular cell adhesion molecule-1 (a marker of inflammation); transforming growth factor beta-1 (a factor involved in scarring) and CD-68 (a macrophage-specific marker). Fibroblast-populated collagen lattices provided a functional assessment of fibroblast...Continue Reading

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