| Item | Value |
| Age at PBT, years (median) | 21 - 42 (33) |
| Age at Fontan procedure | 5 - 13 (6) |
| Sex (male/female) | 2/3 |
| Heart disease | |
| Double outlet right ventricle | 3 |
| Tricuspid atresia | 2 |
| HCC at PBT | |
| Single | 1 |
| Multiple | 4 |
| Time from Fontan procedure to PBT (years) | 15 - 33 (26) |
| Child-Pugh classification | |
| A | 1 |
| B | 4 |
| Proton therapy dose, Gy(RBE): 6 lesions |
|
| 66 GyE/10 Fr | 2 |
| 72.6 GyE/22 Fr | 2 |
| 74 GyE/37 Fr | 2 |
| Anticoagulant or antiplatelet |
|
| Yes | 4 |
| No | 1 |