Preoperative computed tomography-based risk stratification model validation for postoperative pancreatic ductal adenocarcinoma recurrence

Figure 4 Computed tomography images of a 64-year-old male with resectable pancreatic ductal adenocarcinoma. A: Arterial phase; B and C: Portal venous phase computed tomography axial contrast enhancement showed a 3.4 cm hypodense mass in the head of the pancreas with adjacent vascular invasion (white arrow in A), and a suspicious metastatic lymph node adjacent to the pancreatic head with central necrosis (orange arrow in C). The image scale was approximately 0.41 mm per pixel. The patient’s risk score was 5, placing him in the poor prognosis group. A standard pancreaticoduodenectomy was performed, and pathological examination confirmed the diagnosis of poorly differentiated pancreatic ductal adenocarcinoma. The tumor recurred 9 months postoperatively.