Soman, Arundhati D, et al. “Isolated Supraclavicular Lymph Node Metastasis in Pancreatic Adenocarcinoma: A Report of Three Cases and Review of the Literature”. JOP. Journal of the Pancreas, vol. 11, no. 6, Nov. 2010, pp. 604-9, doi:10.6092/1590-8577/3406.