Pietro Invernizzi received his MD in July 1993 from the University of Milan, Italy. His clinical and scientific activities began in 1993 and in December 1996 he received his PhD in Gastroenterology from the University of Milan. He spent most of his PhD program period as a research fellow at the Clinical Mass Spectrometry, Children’s Hospital Medical Center, Cincinnati, OH, USA. In 2000 he completed his 4-years training in Gastroenterology at the University of Milan and was licensed as a gastroenterology specialist, and from 2000 to 2008 he had an appointment as Clinical Assistant at the Division of Internal Medicine and Liver Unit of the San Paolo Hospital School of Medicine of the University of Milan. From 2008 to 2015 Dr. Invernizzi is head of the Center for Autoimmune Liver Diseases, Humanitas Clinical and Research Center, Rozzano (Milan), Italy. From 2007 to 2016 he also had an appointment as Assistant Professor at the Department of Internal Medicine, Division of Rheumatology, Allergy, and Clinical Immunology, School of Medicine, University of California at Davis, CA, USA. From December 2015 Dr Invernizzi is Professor in Gastroenterology, University of Milano-Bicocca (Full Professor from September 2020) and from December 2016 chief of the Division of Gastroenterology and Center for Autoimmune Liver Diseases at the San Gerardo Hospital, Monza, Italy. Dr. Invernizzi has co-authored 322 original publications in peer-reviewed journals with a total citations of 13.245, H index 62. Dr. Invernizzi’s articles have included publications in leading scientific journals such as New England Journal of Medicine, Nature Genetics, The Lancet, Ann Intern Med, Gastroenterology, Journal of Hepatology, Hepatology, and J Immunol. Dr. Invernizzi has authored 28 book’s chapters. Dr. Invernizzi’s areas of scientific expertise are on liver diseases, in particular on rare autoimmune liver diseases such as primary biliary cirrhosis (PBC), primary sclerosing cholangitis (PSC), autoimmune hepatitis (AIH), and their overlaps. More recently he extended his interests on the biliary and neuroendocrine tumors.