PRTN3 and Pulmonary hemorrhage: It was concluded that more investigation would be needed to rule out or identify systemic causes of pulmonary hemorrhage, autoimmune, vasculitis, arteriovenous (AV) malformation, and foreign body and infection (tuberculosis (TB)). The following investigations were sent as part of the workup: cytoplasmic anti-neutrophil cytoplasmic antibody (C-ANCA) and perinuclear ANCA (P-ANCA), antinuclear antibody (ANA), anti-DNA antibody, rheumatoid factor, and anti-glomerular basement membrane (anti-GBM) antibody.