what is granulomatosis polyangitis
Granulomatosis with polyangiitis (GPA), also known as Wegener's granulomatosis (WG), is a systemic disorder that involves both granulomatosis and polyangiitis.It is a form of vasculitis (inflammation of blood vessels) that affects small-and medium-size vessels in many organs.hen referred to as Wegener's granulomatosis, it is named after Friedrich Wegener, who described the disease in 1936. As a response to Wegener's association with the German Nazi party, professional bodies and journals have replaced his name with a descriptive name. However, the older name is still often seen.