Diffuse Alveolar Hemorrhage in a Case of Granulomatosis with Polyangiitis: A Case Report.

Diffuse alveolar hemorrhage (DAH) is a life-threatening pulmonary condition characterized by widespread bleeding into the alveoli, leading to respiratory failure. It can result from various etiologies, including autoimmune disorders, drug reactions, and infections. Here is a rare case of a 37-year-old male who presented with progressive dyspnea, hemoptysis, and hypoxemia. Chest imaging and bronchoscopy confirmed the diagnosis of DAH, while laboratory tests revealed ANCA-associated vasculitis. On diagnosis, the patient with granulomatosis with polyangiitis was initiated on corticosteroids and cyclophosphamide. Early initiation of immunosuppressive therapy and supportive care plays a crucial role in disease management, reducing morbidity in such cases.