Pathologic lesions Number Percentage
Active / acute rejection 292 24.1
Cyclosporine toxicity  134 11
Acute tubular injury 281 23.2
Acute pyelonephritis 79 6.5
Interstitial fibrosis/tubular atrophy 361 29.8
No significant pathology 34 2.8
Others 29 2.4
Total 1210 100
Table 3: Major categories of pathological lesions on 1210 renal allograft biopsies from 575 patients.