Signet Ring Cell Adenocarcinoma of Ampulla of Vater: A Rare Case With Concurrent Non‐gastrointestinal Malignancies: 192. (October 2015) - Linn, Sandar; Haeri, Nami Safai; Lopez‐Morra, Hernan; Tejada, Juan; Nigar, Sofia; Giashuddin, Shah; Chow, Jonathan; Krishnaiah, Mahesh; Anand, Sury