**1. Introduction**

While approaching a patient with jaundice, it is important to understand the different types and approach towards jaundice in order to reach the correct diagnosis. Similarly, when approaching a biliary stricture, one must consider benign as well as malignant etiologies since they can be clinically identical. Eosinophilic cholangitis (EC) is a rare benign disorder of the biliary tract which can cause biliary obstruction.

This is the first book that has a specific chapter for a very rare disease, eosinophilic cholangitis. In this chapter, we will briefly discuss the approach towards jaundice before jumping to the main topic of eosinophilic cholangitis. We hope that you will find the information provided informative.
