Table 1.

Definitions of biliary obstruction in the future liver remnant

Patient type	Definition of inadequate biliary drainage
Drainage naïve	Serum Bilirubin >50 μmol/L.
Drainage non-naïve	Persistently rising total bilirubin level above 50 μmol/L (i.e. no stent placed or insufficient draining stent).
	Persistent biliary dilatation in the FLR on imaging (i.e. previous stent placed in contralateral side of liver).

Patients are ‘drainage non-naïve’ if they underwent previous (attempted) EBD before referral to one of the enrolling centers.