Radiographic findings consistent with borderline resectable PDAC. A) An interface between the primary tumor and the superior mesenteric vein measuring at least 180° of the circumference of the vessel wall; B) An interface between the tumor and superior mesenteric artery measuring less than 180° of the circumference of the vessel wall; C) Circumferential interface between the tumor and the common hepatic artery. T, tumor; A, superior mesenteric artery; V, superior mesenteric vein; H, common hepatic artery; C, celiac trunk.