causes of fibrosis and septal thickening
Interstitial lung disease (ILD) (also known as Diffuse Parenchymal Lung Disease) is a broad â term /. blanket â term that describes a group of as many as 200 chronic progressive lung disorders that. share similar characteristics of alveolar septal thickening, fibroblast proliferation, collagen. deposition and, most often, pulmonary scarring (fibrosis). This set of disorders can further be. classified as acute or chronic, primary or secondary, secondary to a known cause or of unknown. causes (idiopathic), granulomatous or non-granulomatous, etcâ¦ Interstitial Lung Disease is also.