"Five steps four quadrants" modularized en bloc dissection technique for accessing hepatic hilum lymph nodes in laparoscopic pancreaticoduodenectomy

Table 1 Patient baseline information

Variables	Value
Gender: Male/female	36/16
Age (yr)	62.2 ± 11.0
BMI (kg/m2)	22.3 ± 3.3
Tumor site: Pancreatic head/periampulla/distal biliary duct	26/16/10
TBIL (µmol/L)	57.7 (16.0-155.7)
Preoperative biliary drainage: Yes/no	6/46
ALB (g/L)	37.2 (34.7-39.2)
PT (s)	11.1 (10.3-11.4)
PLT (109/L)	209 (163.5-261.8)
CA19-9 (U/mL)	59.9 (13.3-391.6)
CEA (ng/mL)	2.0 (1.1-3.8)
CA125 (U/mL)	9.8 (6.1-15.8)
Lymph node dissection time (min)	50 (41-54)
Number of lymph node dissection	6 (6-7)
Number of positive lymph node: 0/1/2/3	40/8/3/1
Intraoperative blood loss (mL)	25.0 (20.0-33.8)

BMI: Body mass index; TBIL: Total bilirubin; ALB: Albumin; PT: Prothrombin time; PLT: Platelet count; CA19-9: Carbohydrate antigen 19-9; CEA: Carcinoembryonic antigen; CA125: Carbohydrate antigen 125.