Table 1. Summary of the Demographic and Surgical Characteristics of the Variant as Well as the Control Group of Patients.
| Anatomical variant group | Control group | |
|---|---|---|
| Number of patients | 41 | 41 |
| Gender | ||
| Male | 20 | 22 |
| Female | 21 | 19 |
| Average age (years) | 64 | 65 |
| Primary pathology | ||
| PDAC | 23 | 22 |
| Ampullary adenocarcinoma | 8 | 7 |
| CC | 2 | 1 |
| IgG4 pancreatitis | 2 | 0 |
| Duodenal villous adenoma | 2 | 2 |
| SPPT | 1 | 0 |
| Choledochal cyst | 0 | 2 |
| NET | 1 | 2 |
| IPMN | 2 | 4 |
| Duodenal GIST | 0 | 1 |
| Anticoagulant therapy | 3 | 1 |
| Antiplatelets therapy | 13 | 13 |
| Previous abdominal surgery | 5 | 6 |
| Average BMI | 27.4 | 28.2 |
PDAC: pancreatic ductal adenocarcinoma; CC: cholangiocarcinoma; IgG4: immunoglobulin G4; SPPT: solid pseudopapillary tumor; NET: neuroendocrine tumor; IPMN: intraductal papillary mucinous neoplasm; GIST: gastrointestinal stromal tumor; BMI: body mass index.