Table 1.
Tubulointerstitial light microscopy
| Tubulointerstitium | Total, n=85 | Severe AKI, n=46 | No Severe AKI, n=39 |
|---|---|---|---|
| Acute tubular injury | |||
| Mild | 36 (42) | 17 (37) | 19 (49) |
| Moderate | 27 (32) | 13 (28) | 14 (36) |
| Severe | 15 (18) | 11 (24) | 4 (10) |
| Bacterial foci | 4 (5) | 3 (6) | 1 (3) |
| Protein casts | 52 (61) | 27 (59) | 25 (64) |
| Molding casts | 21 (25) | 12 (26) | 9 (23) |
| Pigment casts | 46 (54) | 24 (52) | 22 (56) |
| Cytoplasmatic pigments | 50 (59) | 25 (54) | 25 (64) |
| Syncytium | 24 (28) | 15 (33) | 9 (23) |
| Regeneration | |||
| Mild | 48 (56) | 25 (54) | 23 (59) |
| Moderate | 28 (33) | 14 (30) | 14 (36) |
| Severe | 6 (7) | 4 (9) | 2 (5) |
| Isometric vacuolation | 66 (78) | 38 (83) | 28 (72) |
| Microthrombosis | 2 (2) | 1 (2) | 1 (3) |
| TA/IF | |||
| 0 | 32 (38) | 19 (41) | 13 (33) |
| 1 | 38 (45) | 17 (37) | 21 (54) |
| 2 | 9 (11) | 7 (15) | 2 (5) |
| 3 | 2 (2) | 0 (0) | 2 (5) |
| Tubulointerstitial nephritis | 6 (7) | 4 (9) | 2 (5) |
Data are expressed as n (%). TA/IF, tubular atrophy/interstitial fibrosis.