Threaded biliary inside stents are a safe and effective therapeutic option in cases of malignant hilar obstruction

Table 2 Details of patients with threaded PS placement

	Primary lesion	Performance status	Stage	Bismuth classification	Initial stent	Multiple stent	EST*	Chemotherapy	Patency period	Outcome
1	Bile duct	2	IV	IV	N	N	Y	No	350	Death
2	Bile duct	2	IV	IV	N	Y	Y	No	300	Death
3	Gall bladder	0	IV	I	N	N	N	GEM	270	Obstruction
4	Bile duct	0	IV	IV	N	Y	Y	GEM	72	Obstruction
5	Bile duct	1	IV	IV	N	N	Y	No	108	Death
6	Pancreas	1	IV	I	Y	N	N	GEM	56	Obstruction
7	Gall bladder	3	IV	II	Y	N	N	No	6	Obstruction by Coagulation
8	Gall bladder	1	IV	III	N	N	N	S-1	127	Obstruction
9	Bile duct	2	III	III	Y	N	N	GEM	41	Death
10	Pancreas	2	IV	I	Y	N	N	No	32	Death
11	Gall bladder	1	IV	IV	N	N	N	No	80	Obstruction
12	Pancreas	2	III	I	Y	N	N	No	290	Alive

EST, endoscopic sphincterotomy; GEM, gemcitabine.
* These cases have already received endoscopic sphincterotomy in the earlier stent placement of MS or PS before threaded PS insertion.