A sudden worsening of pulmonary fibrosis with no known cause. A medical procedure in which an instrument (bronchoscope) is passed through the mouth or nose into the lungs. Fluid is then squirted into ...

Pulmonary fibrosis is a disease where there is scarring of the lungs—called fibrosis—which makes it difficult to breathe. This is because the scarring causes the tissues in the lungs to get thick and ...