Which type of ANCA-associated vasculitis has the worst prognosis for patients?

ANCA-associated vasculitis is a group of autoimmune diseases that damage blood vessels. The main types include granulomatosis with polyangiitis (GPA), microscopic polyangiitis (MPA), and eosinophilic granulomatosis with polyangiitis (EGPA). While treatments have improved, the long-term outlook for patients remains a serious concern. Research indicates that one specific subtype has a notably poorer outcome than the others.

What the research says

A study of Japanese patients found that microscopic polyangiitis (MPA) showed the poorest prognosis among all ANCA-associated vasculitis subtypes. In this group, five-year survival was 67.6%, which is lower than the rates seen in other forms of the disease ³.

Data from a large US-based cohort analysis supports the finding that MPA carries a high risk of death. This study identified nearly 6,000 patients with MPA and found that mortality was significantly higher than in matched controls without vasculitis. The risk of death was increased in both GPA and MPA patients, but the specific analysis highlighted the poor long-term outlook for MPA ².

Another review discusses how lysosomal pathways are involved in the progression of autoimmune kidney diseases, including ANCA-associated vasculitis. It notes that despite better therapies, long-term morbidity and mortality in AAV remain high, with active vasculitis and cardiovascular disease being leading causes of death ¹.

What to ask your doctor

• How does my specific subtype of ANCA-associated vasculitis affect my long-term survival chances?
• What are the main causes of death for patients with my specific type of vasculitis?
• Are there new treatments that can improve the prognosis for microscopic polyangiitis specifically?
• How often should I monitor my kidney function to catch disease progression early?