From: Assessment of disease control rate and safety of sorafenib in targeted therapy for advanced liver cancer
Stage
Tumor condition
Score
A1
1 tumor
0
A2
A3
A4
3 tumors with a diameter smaller than 3Â cm.
B
Multiple tumors
C
Multiple tumors with vascular invasion or extrahepatic metastasis
1–2
D
Any tumor stage
3–4