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. 2012 Jan 11;12:e1.

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Copyright © 2012 The Author(s)

This is an open-access article whereby the authors retain copyright of the work. The article is distributed under the Creative Commons Attribution License, which permits unrestricted use, distribution, and reproduction in any medium, provided the original work is properly cited.

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Changes in keloid tissue after laser irradiation, as observed by light microscopy. Half of the precordial keloid of a 26-year-old woman was irradiated with laser. Three days later, the unirradiated (left) and irradiated keloid halves (right) were excised and examined by hematoxylin and eosin staining (top images) and Elastica Masson-Goldner (middle and bottom images) staining. Structural changes were observed in the collagen of the irradiated tissues. Intense inflammatory cell infiltration was observed by hematoxylin and eosin staining.