<prompt> Causes of pulmonary-renal syndrome -LeptospirosisHanta virusParaquat poisoningAll  <response>: The pulmonary renal syndrome is a dramatic presentation with renal and respiratory failure that is not explained by excess intravascular fluid or by severe pneumonia;it occurs in Good pasture s diseaseanti-GBM and small-vessel vasculitis.Other causes include leptospirosis leading to Weils disease,Hanta hemorrhagic fever and poisoning with the herbicide paraquat. Ref:Davidsons medicine-22nd edition,page no:519. 