Although diffuse alveolar hemorrhage can have various causes (eg, infection, toxins, drugs, hematologic or cardiac disorders), autoimmune disorders are the most common causes. Symptoms, signs, and chest-x-ray findings are not specific. Pulmonary hemorrhage is an unusual and often fatal complication of SLE. Patients present with acute symptoms of hemoptysis, respiratory failure, tachycardia, and high fevers and may survive for 2 hours to 3 years after the first hemorrhage