Table 1 Baseline characteristics of patients with biliary system neuroendocrine neoplasm

Age at diagnosis, year

 ≤ 40

6

12

3

 40–49

4

11

6

 50–59

23

13

9

 60–69

33

23

9

 ≥ 70

53

23

5

Sex

 Male

36

44

23

 Female

83

38

9

Race

 White

97

67

21

 Black

11

7

7

 Others

11

8

4

Grade

 I

18

23

11

 II

19

16

6

 III

62

29

11

 IV

20

14

4

Pathology

 NET

19

35

14

 NEC

72

35

10

 MiNEN

26

12

8

RX Summ—Surg Prim Site (1998+)

 Total surgical removal of primary site: enucleation

(Total surgical removal of the primary site + Local tumor excision + Simple removal of primary site)

92

33

19

 Radical surgery

27

49

13

RX Summ—Scope Reg LN Sur (2003+)

 None

79

13

12

 1–3 regional lymph nodes removed

25

10

3

 4 or more regional lymph nodes removed

15

59

17

Regional nodes positive (1988+) (median, range)

1 (0–15)

2 (0–14)

0 (0–6)

Lymph node metastasis

 Present

31

46

12

 Absent

88

36

20

CS tumor size (2004–2015) (median, range, mm)

40 (3–150)

20 (2–90)

20 (2–65)

Survival months (median, range, months)

12 (0–224)

25.5 (0–368)

34.5 (2–345)