Table 1.

Contraindications to hepatic resection in patients with colorectal liver metastases (European Society of Medical Oncology consensus guideline 2016, Van Custem et al.)

Category
Technical (A)
1. Absolute	Impossibility of R0 resection with ≥30% liver remnant
	Presence of unresectable extrahepatic disease
2. Relative	R0 resection possible only with complex procedure (portal vein embolization, two‐stage hepatectomy, hepatectomy combined with ablation)
	R1 resection
Oncological (B)
1	Concomitant extrahepatic disease (unresectable)
2	Number of lesions ≥ 5
3	Tumor progression

Patients should be categorized as A1 or A2/B1, B2 or B3.