Hong SM, Goggins M, Wolfgang CL, Schulick RD, Edil BH, Cameron JL, Handra-Luca A, Herman JM, Hruban RH. Vascular invasion in infiltrating ductal adenocarcinoma of the pancreas can mimic pancreatic intraepithelial neoplasia: a histopathologic study of 209 cases. Am J Surg Pathol. 2012 Feb; 36(2):235-41.