| Endoscopic diagnosis | Performed biopsy | Histological finding | n | % | |
| GVHD | 25 | 21 | GVHD | 10 | 47.6 |
| GVHD + CMV | 3 | 14.3 | |||
| CMV | 1 | 4.8 | |||
| colitis/proctitis | 7 | 33.3 | |||
| CMV | 4 | 4 | CMV | 3 | 75.0 |
| GVHD | 1 | 25.0 | |||
| TMA | 1 | 1 | TMA | 1 | 100 |
| colitis/proctitis | 2 | 2 | colitis/proctitis | 2 | 100 |