Pulmonary- renal syndrome (PRS) is defined as the presence of alveolar hemorrhage and rapidly progressive glomerulonephritis. It was initially described as glomerular basement membrane syndrome, although other more common causes and mechanisms are involved such as, anti-neutrophil cytoplasmic antibody-associated vasculitis (ANCA), systemic lupus erythematosus, antiphospholipid syndrome, cryoglobulinemia, and thrombotic microangiopathy.