| Prognostic stage | I | II | III | A | B | |
| Durie and Salmon (n = 50) | n | 2 | 46 | 41 | 7 | |
| (%) | 4 | 95 | 85 | 14 | ||
| ISS (n = 25) | n | 3 | 7 | 8 | ||
| (%) | 1.7 | 38.9 | 44.4 | |||