A 54-Year-Old Man Presenting With Progressive Dyspnea and Interstitial Lung Abnormalities.

CASE PRESENTATION:A 54-year-old man presented with a 6-month history of progressive dyspnea occurring at rest and with minimal exertion. His medical history was notable for hypertension, non-insulin-dependent diabetes, coronary artery disease, and factor V Leiden heterozygosity. His social history was notable for a 43-pack-year smoking history but was otherwise unremarkable.