Figure 2b.

PD-1 inhibitor pneumonitis: AIP/ARDS pattern in a 38-year-old woman with advanced melanoma who was treated with nivolumab. Axial (a) and coronal (b) chest CT images obtained at 15 weeks of therapy show diffuse GGOs and traction bronchiectasis, with markedly decreased lung volumes seen on the coronal image and an elevated right hemidiaphragm, findings indicative of a radiologic AIP/ARDS pattern. The patient was admitted to the intensive care unit, was treated with intravenous corticosteroids, and also required infliximab (an anti–tumor necrosis factor-α immunosuppressive agent) therapy.