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  Indian J Med Microbiol
 

Figure 4: Polarized light assessment of Picrosirius red stain revealing the maturation process of collagen fibers: (a) Preoperative biopsy of old acne scar showing orange-red birefringence collagen fibers; (b) postoperative 18 weeks biopsy showing very recently formed green birefringence collagen fibers; (c) postoperative 26 weeks biopsy revealing more mature yellow birefringence collagen fibers

Figure 4: Polarized light assessment of Picrosirius red stain revealing the maturation process of collagen fibers: (a) Preoperative biopsy of old acne scar showing orange-red birefringence collagen fibers; (b) postoperative 18 weeks biopsy showing very recently formed green birefringence collagen fibers; (c) postoperative 26 weeks biopsy revealing more mature yellow birefringence collagen fibers