| Reason | No. of cases | Necrotic vol. ratio (%) |
| Alcohol | 49 | 33.55 ± 5.8 |
| CTSs | 35 | 26.74 ± 9.6 |
| Trauma | 4 | 40.41 ± 10.3 |
| Idiopathic | 4 | 18.39 ± 4.7 |
| Total | 92 | ----- |