This book is a review of biliary tract cancers (Cholangiocarcinoma) and, above all, the most recent guidelines on this pathology from both a diagnostic and therapeutic points of view. This pathology has become more frequent than in the past and has benefited from the latest technological advances in terms of diagnosis and therapeutic management, which have attempted to improve its prognosis, which however remains very reserved.Through this book, we have tried to bring together the latest recommendations to obtain an accurate and early diagnosis and thus offer an appropriate and effective treatment and therefore improve the prognosis.