Superior Mesenteric Artery Margin of Posttherapy Pancreaticoduodenectomy and Prognosis in Patients With Pancreatic Ductal Adenocarcinoma

Negative-margin resection is crucial to favorable prognosis in patients with pancreatic ductal adenocarcinoma. However, the definition of a negative superior mesenteric artery margin (SMAM) varies. The College of American Pathologists defines positive SMAM as the presence of tumor cells at the margin, whereas the European protocol is based on a 1 mm clearance. In this study, we examined the prognostic significance of the SMAM distance in 411...