Figure 2.
Diagnostic algorithm for discrimination between COVID-19 and ICI pneumonitis. CRP, C-reactive protein; ERS, erythrocyte sedimentation rate; PT, prothrombin time; S-IL-2-R, soluble interleukin 2 receptor; IL-6, interleukin 6; BAL, bronchoalveolar lavage; GGO, ground-glass opacity; OP, organizing pneumonia; NSIP, non-specific interstitial pneumonia; HP, hypersensitivity pneumonitis. For features of OP, NSIP, and HP we refer to the accompanying text.