1. Introduction Churg-Strauss Syndrome (CSS), also known as Eosinophilic Granulomatosis with Polyangiitis (EGPA), is a rare autoimmune disorder characterized by inflammation of blood vessels and an abnormal increase in eosinophils. This chronic condition primarily affects the lungs, skin, nerves, and heart, leading to asthma, allergic rhinitis, and vasculitis-related complications. With...