Figure 3. Prevalence of histological lesions related to immune activity.

Most (95.9%) of the patients with proteinuria had at least one kind of immunological lesion, based on histology. Interstitial inflammation was the most common lesion, which could be detected in 95.9% patients with proteinuria, followed by glomerulitis in 70.4%, C4d deposition in peritubular capillaries in 53.1%, tubulitis in 46.9%, and intimal arteritis in 14.3%. While in the control group, only few recipients have immunological lesion. *, p<0.05 comparing with control group; **, p<0.001 comparing with control group.