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 Indian J Med Microbiol  
 

Figure 1: (a) Reddish-birefringence of collagen fibers in normal mucosa (PSR, photomicrograph 20×) (b) reddish-orange birefringence of collagen fibers in oral squamous cell carcinoma (PSR, photomicrograph 20×). (c) Yellowish-orange birefringence of collagen fibers in oral squamous cell carcinoma (PSR, photomicrograph 20×). (d) Greenish-yellow birefringence of collagen fibers in oral squamous cell carcinoma (PSR, photomicrograph 20×)

Figure 1: (a) Reddish-birefringence of collagen fibers in normal mucosa (PSR, photomicrograph 20×) (b) reddish-orange birefringence of collagen fibers in oral squamous cell carcinoma (PSR, photomicrograph 20×). (c) Yellowish-orange birefringence of collagen fibers in oral squamous cell carcinoma (PSR, photomicrograph 20×). (d) Greenish-yellow birefringence of collagen fibers in oral squamous cell carcinoma (PSR, photomicrograph 20×)