Prof. Dr. Ioannis S. Papanikolaou is a Professor in Internal Medicine/Gastroenterology, in the 2nd Academic Department of Gastroenterology at “Attikon” University General Hospital, National and Kapodistrian University of Athens, Greece. He obtained his doctorate at the Medical School of the National and Kapodistrian University of Athens and worked as a Lecturer and then as a Professor of Internal Medicine-Gastroenterology at the University of Athens from 2012 to present. He has gained international experience by working and studying in many European countries and the US. His specialist interest is in Gastrointestinal Endoscopy. He has more than 187 scientific international papers with an h index factor of 38 and more than 7900 citations to his work (Google Scholar, 22 November 2025). He is involved in several "Horizon" Projects with special interest in early diagnosis of colorectal and pancreatic cancer.