Interstitial lung diseases (ILD) are uncommon, inflammatory and fibrotic processes. Affect interstitium but often also alveoli and airways. Goal is to make early dx and identify those d/o which are treatable.
DPLD can be broken into the following categories (% of all DPLD)
Idiopathic Pulmonary Fibrosis (20%)
Chronic hypersensitivity pneumonitis - mold, bird exposure, mycobacteria, other (20%)
Most DPLDs require Video-Assisted Thoracoscopic Surgery (VATS) to make the diagnosis (in addition to history, exam, labs/serologies, PFTs, and imaging to identify as DPLD). Exception is IPF: If typical presentation and imaging, diagnosis can be made without lung biopsy.