Nelson Shu-Sang Yee, MD, PhD, FACP, RPh., is the Team Leader of Gastrointestinal Oncology at Penn State Cancer Institute in Hershey, Pennsylvania, USA. Dr. Yee is a medical oncologist at Penn State Health Milton S. Hershey Medical Center, where he specializes in treating patients with cancers of various digestive organs. As a research pioneer in developmental biology and genetics of exocrine pancreas, he has identified several developmental regulators and translated them into clinical biomarkers and therapeutic targets. As the principal investigator, Dr. Yee has initiated and conducted clinical studies to evaluate the efficacy and safety of targeted therapeutics in patients with malignant diseases of the digestive system. He was invited to provide expert review of grant applications for funding agencies in United Kingdom, Italy, France, Switzerland, Czech, and America. Dr. Yee has guest edited several thematic issues in medical journals, and he serves on the editorial advisory board of a number of scientific and clinical journals. While he published original research articles, reviews, case reports, commentaries, and book chapters, Dr. Yee presented at research conferences in China, Hong Kong, Germany, England, and America. Following undergraduate studies with major in pharmacy and chemistry at Massachusetts College of Pharmacy, he pursued medical education and graduate research training at Cornell University. At Hospital of the University of Pennsylvania, Dr. Yee underwent postgraduate clinical training in Internal Medicine, Hematology, and Medical Oncology. Currently, Dr. Yee is Associate Professor of Medicine, and he directs the Clinical Clerkship of Medicine in Hematology-Oncology, Clinical Elective in Medical Oncology, Clinical Elective in Hematology, as well as Acting Internship in Hematology-Oncology.