Precision medicine in primary biliary cholangitis.

For many years the one-size-fits-all approach has been the only one available to manage patients affected by primary biliary cholangitis. The introduction of obeticholic acid in 2016 as a second-line treatment, together with the creation and validation of several biochemically based scores to stratify the risk of progressive disease, has opened up the need to redefine clinical practice by changing the actual paradigm. The precision medicine initiative is a model of patient-centered health care that aims to improve medicine based on genotypic and molecular characteristics that correlate to specific phenotypic, individual characteristics. In summary, the aim of the precision medicine is to define the right treatment for the right person at the right time. The availability of a second-line disease-modifying drug and new molecules in phase 2 or 3 trials makes this an exciting time for the precision medicine initiative in primary biliary cholangitis. In this review we describe the current risk stratification tools and we track a possible path towards the application of precision medicine in clinical daily life.