Amy Chappell PA Surgical Oncology Esophageal Gallbladder & Bile Duct Liver Neuroendocrine Tumors Pancreatic Rectum Stomach Cancers Treated: Esophageal Gallbladder & Bile Duct Liver Neuroendocrine Tumors Pancreatic Rectum Stomach About Amy Chappell About Amy Chappell Positions Roswell Park Comprehensive Cancer Physician Assistant Surgical Oncology