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Immune checkpoint inhibitors are novel agents that have been proved efficacious in a variety of cancer types, but they are associated with a unique set of organ-specific, immune-related adverse events. Among them, immune-related pneumonitis requires special attention because it is difficult to diagnose and potentially lethal. Accumulating real-world epidemiological data suggest that immune-related pneumonitis is more frequent than previously reported. Its diagnosis requires exclusion of other causes and assessment of radiographic features on high-resolution CT of the chest. Management of immune-related pneumonitis is based on the use of immunosuppressants. Future research should be focused on finding predictive biomarkers for immune-related pneumonitis as well as optimizing its management.

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Background and Objective There remains a paucity of large databases for patients with idiopathic pulmonary fibrosis (IPF) and lung cancer. We aimed to create a European registry. Methods This was a multicentre, retrospective study across seven European countries between 1 January 2010 and 18 May 2021. Results We identified 324 patients with lung cancer among 3178 patients with IPF (prevalence = 10.2%). By the end of the 10 year‐period following IPF diagnosis, 26.6% of alive patients with IPF had been diagnosed with lung cancer. Patients with IPF and lung cancer experienced increased risk of all‐cause mortality than IPF patients without lung cancer (HR: 1.51, [95% CI: 1.22–1.86], p < 0.0001). All‐cause mortality was significantly lower for patients with IPF and lung cancer with a monocyte count of either <0.60 or 0.60–<0.95 K/μl than patients with monocyte count ≥0.95 K/μl (HR [<0.60 vs. ≥0.95 K/μl]: 0.35, [95% CI: 0.17–0.72], HR [0.60–<0.95 vs. ≥0.95 K/μl]: 0.42, [95% CI: 0.21–0.82], p = 0.003). Patients with IPF and lung cancer that received antifibrotics presented with decreased all cause‐mortality compared to those who did not receive antifibrotics (HR: 0.61, [95% CI: 0.42–0.87], p = 0.006). In the adjusted model, a significantly lower proportion of surgically treated patients with IPF and otherwise technically operable lung cancer experienced all‐cause mortality compared to non‐surgically treated patients (HR: 0.30 [95% CI: 0.11–0.86], p = 0.02). Conclusion Lung cancer exerts a dramatic impact on patients with IPF. A consensus statement for the management of patients with IPF and lung cancer is sorely needed.