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Immunohistochemistry scores to evaluate COX-2 expression. Score 1 (A): multifocal and moderate positivity (pink stain) around the granulomas; score 2 (B): multifocal and moderate positivity around the granulomas and in interstitial tissue; score 3 (C): diffuse and strong positivity around the granuloma and in the interstitial tissue. Magnification 10×.
