Interstitial lung disease involves over 180 chronic lung disorders. The diseases got their name because the tissue between the air sacs of the lungs, the interstitium, is affected by fibrosis (scarring). This category of diseases is also known as Pulmonary Fibrosis. Most of the diseases cause inflammations of the bronchioles, alveoli or small blood vessels — affecting breathing and oxygen transport. Discuss Pulmonary Fibrosis — symptoms, diagnosis, prognosis, treatment and management — here.