Table 2 Details of initial balloon dilation treatment

Total, n

37

Gender, n (male/female)

25/12

Age, median (range)

70 (51–83)

Primary disease, n

 Malignant disease

26

 Pancreatic cancer

19

 Cholangiocarcinoma

3

 Duodenal papillary cancer

2

 Neuroendocrine tumor

2

Benign disease

11

 IPMN

7

 others

4

Surgical reconstruction, n

 PD with modified Child’s method

30

 PD with others

2

 Choledochojejunostomy

5

The median time from surgery to first endoscopic treatment,　months (range)

11.5 (0.8–97.5)

Diameter of bile duct, mm, median (range)

7 (2–13.9)

Balloon diameter, n

 6 mm/8 mm/10 mm/11 mm/12 mm

5/21/6/3/2

Residual waist during balloon dilation, n

18

Presence of biliary stone, n

21

Presence of Scar like appearance, n

12

Restenosis, n

12 (32%)

Time to CJS recurrence after balloon dilation, days

8.4 (0.5–15.4)