The aim of this book is to expand the knowledge of physicians in training, experienced clinicians, in the field of hepatology. The expansion of liver transplantation within hepatology, and the demanding care that patients in liver transplant hospital services require, have changed the focus of clinical hepatology to a surgical subspecialty, laced with immunology. There is a vacuum in the knowledge of classical hepatology in the developing physicians, and medical students that this book aims to fill. In this context, the experience in hospital and outpatient medicine in the care of patients with liver disease in public hospitals represents a source of information that will be made available to the readers.