Fig. 3From: Persistent synovial inflammation plays important roles in persistent pain development in the rat knee before cartilage degradation reaches the subchondral boneInflammatory response of the synovial membrane and infrapatellar fat pad after the monoiodo-acetic acid injection. a Representative images of hematoxylin and eosin staining of sagittal sections of synovial tissues at each time point. The area indicated in the black box in low magnification image is enlarged and indicated. b, c Infrapatellar fat pad inflammation score was blindly evaluated by two independent researchers and data are presented in these panels. There were 6 samples at each time point. Four sections were randomly selected from each sample and evaluated. The median values and quartiles were recorded. The asterisks indicate the statistically significant valuesBack to article page