Table 2 New risk stratification system including the number of focal lesions on PET/CT with the R-ISS.
R-ISS/PET | R-ISS | No of FL | No (%) | OS at 2 years % (95% CI) | PFS at 2 years % (95% CI) |
|---|---|---|---|---|---|
Stage I | I | ≤ 3 | 31 (8.2) | 96.7 (93.4–100.0) | 84.1 (76.6–91.6) |
Stage II | I | > 3 | 156 (41.1) | 89.8 (86.9–92.7) | 64.7 (60.0–69.4) |
II | ≤ 3 | ||||
Stage III | II | > 3 | 162 (42.6) | 74.7 (70.8–78.6) | 40.8 (36.2–45.4) |
III | ≤ 3 | ||||
Stage IV | III | > 3 | 31 (8.2) | 50.3 (38.4–62.2) | 17.1 (8.5–25.7) |
