Pulmonary Fibrosis

**Semantic type:** Disease or Syndrome

**Definition:** Chronic progressive interstitial lung disorder characterized by the replacement of the lung tissue by connective tissue, leading to progressive dyspnea, respiratory failure, or right heart failure. Causes include chronic inflammatory processes, exposure to environmental irritants, radiation therapy, autoimmune disorders, certain drugs, or it may be idiopathic (no identifiable cause).

**Synonyms:** - Pulmonary Interstitial Fibrosis - Pulmonary fibrosis - Pulmonary interstitial fibrosis