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. 2018 May;10(Suppl 13):S1438–S1446. doi: 10.21037/jtd.2018.05.130

Figure 1.

Figure 1

Pseudoprogression and dissociated response. A 68-year-old male patient with history of NSCLC metastatic to lung and liver. (A,B) Axial chest CT images before (A) and after 12 weeks (B) of treatment with nivolumab (an anti-PD-1 monoclonal antibody) showing increase in size of the lesions (arrows) and appearance of new lung nodules (circles: these findings were stable at the subsequent CSI); (C,D) axial CT images of the same patients before (C) and after 12 weeks (D) of treatment showing decrease in size of some liver lesions (arrows) and disappearance of a metastatic lesion (circle). NSCLC, non-small cell lung cancer; CSI, cross sectional imaging.