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. 2023 Sep 12;19(3):230101. doi: 10.1183/20734735.0101-2023

FIGURE 1.

FIGURE 1

Illustration of the different types of interstitial lung disease (ILD) associated with progressive pulmonary fibrosis. ILDs can be broadly categorised into connective tissue disease (CTD)-ILDs, other ILDs, and unclassifiable ILDs (uILDs). The CTD-ILDs are further sub-categorised based on the type of CTD, including rheumatoid arthritis-associated ILD, systemic sclerosis-associated ILD, mixed CTD-associated ILD, and other autoimmune ILDs. Other ILDs include exposure related ILDs (e.g. asbestosis and silicosis), non-idiopathic pulmonary fibrosis (such as genetic and/or familial pulmonary fibrosis (g/f PF)), idiopathic interstitial pneumonias (such as desquamative interstitial pneumonia), and others. HP: hypersensitivity pneumonitis; iNSIP: idiopathic nonspecific interstitial pneumonia; IPAF: interstitial pneumonia with autoimmune features; IPF: idiopathic pulmonary fibrosis.