Table 2 Patients’ demographics and tumor characteristics

Patients’ demographics

Age (years)

73.3 ± 7.1 (59–84)

Gender (Male:Female)

18 (46):21 (54)

Body mass index (kg/m²)

20.7 ± 3.5 (14.9–31.5)

CEA (ng/mL)

4.2 ± 3.7 (0.9–20.2)

CA19-9 (U/mL)

285.7 ± 404.7 (0.1–1818.8)

Tumor characteristics

Location (head/body/tail)

21/11/7

Tumor size (mm)

18.7 ± 5.3 (9.2–30.6)

pT stage (0/1a/1b/1c/2/3/4)

1/0/0/9/26/3/0

pN stage (0/1/2)

15/13/11

TNM stage (1A/1B/2A/2B/3/4)

6/9/0/13/11/0

Tumor differentiation (wel/mod/por)

8/29/2

R classification (0/1)

33/6

Massive intratumoral necrosis (−/ +)

28/11