| AAV | ANCA-associated vasculitis |
| ANA | anti-nuclear antibody |
| ANCA | anti-neutrophilic cytoplasmic antibody |
| APL | anti-phospholipid antibody |
| ARDS | Acute respiratory distress syndrome |
| BAL | bronchoalveolar lavage |
| β2GP | β-2glycoprotein1 |
| CL | anti-cardiolipin antibody |
| CR | complete response |
| CT | Chest computed tomography |
| DAH | Diffuse alveolar hemorrhage |
| DAMPs | danger-associated molecular patterns |
| EACA | Epsilon-amino-caproic acid |
| ESRD | end-stage renal disease |
| ETT | Endotracheal tube |
| GBM | Glomerular basement membrane |
| GVHD | graft-versus-host disease |
| HCT | Hematopoietic stem cell transplantation |
| HLH | Hemophagocytic lymphohistiocytosis |
| ICU | Intensive care unit |
| IPH | Idiopathic pulmonary hemosiderosis |
| NET | Neutrophil extra-cellular traps |
| NR | No response |
| PEEP | Positive end-expiratory pressure |
| PR | Partial response |
| RDS | Respiratory distress syndrome |
| FVIIa | Recombinant factor VIIa |
| RF | Rheumatoid factor |
| TF | Tissue factor |
| TFPI | Tissue factor pathway inhibitor |
| TXA | Tranexamic acid |