Wegener's Granulomatosis, now more commonly referred to as Granulomatosis With Polyangiitis (GPA), is a Rare disorder characterized by the Inflammation of blood vessels (vasculitis), which can lead to Damage in various organs, primarily affecting the Respiratory Tract and kidneys. It is an Autoimmune condition where the Immune System mistakenly attacks its own tissues, leading to the Formation of granulomas and Widespread inflammation.