Pulmonary-renal syndrome is a rare medical syndrome involving bleeding in the lungs and kidney damage (glomerulonephritis).
Causes
Causes are usually autoimmune.
It is most commonly due to granulomatosis with polyangiitis or Goodpasture's syndrome. Granulomatosis with polyangiitis usually presents with nasopharyngeal involvement as well, whereas Goodpasture's will not.
Other causes include systemic lupus erythematosus and microscopic polyangiitis.
References
Pulmonary-renal syndrome Wikipedia(Text) CC BY-SA