Fig. 2

Comparison of needle biopsy and surgical biopsy in 72 samples of patients diagnosed as IgG4-RD. a The comparison of IgG4/HPF count and the ratio of IgG4/IgG in different biopsy method groups. b The comparison of histopathological features between the two groups. c The difference of the diagnostic coincidence rates between the two groups with 2011 comprehensive diagnostic criteria. d The difference of the diagnostic coincidence rates between the two groups with histological diagnosis categories. *P < 0.05, **P < 0.01