Granulomatosis with Polyangiitis

Granulomatosis with Polyangiitis is a rare disease that causes inflammation of blood vessels, primarily affecting the respiratory tract and kidneys. This inflammation can lead to damage in the nose, sinuses, lungs, and kidneys, causing symptoms like persistent sinus infections, nosebleeds, cough, and blood in the urine. The condition is an autoimmune disorder, meaning the body's immune system mistakenly attacks its own tissues. It can cause serious health problems if not diagnosed and treated early. The disease often requires ongoing medical care to manage symptoms and prevent complications.

Granulomatosis with Polyangiitis is a systemic vasculitis characterized by necrotizing granulomatous inflammation and small to medium vessel vasculitis. It is an autoimmune disorder typically associated with the presence of anti-neutrophil cytoplasmic antibodies (ANCA), especially c--ANCA directed against proteinase 3 (PR3). The disease primarily affects the upper and lower respiratory tracts and kidneys, leading to granuloma formation and glomerulonephritis. Clinical significance lies in its potential to cause life-threatening organ damage if untreated. The pathogenesis involves immune-mediated endothelial injury and granulomatous inflammation. It is classified among the ANCA-associated vasculitides and requires differentiation from other vasculitides and infectious granulomatous diseases.