Anti-programmed cell death ligand 1-based immunotherapy in recurrent hepatocellular carcinoma with inferior vena cava tumor thrombus and metastasis: Three case reports

Figure 1 Computed tomography images of inferior vena cava tumor thrombus before and after a second surgery. A: Acquired before surgery showed the existence of an inferior vena cava tumor thrombus that protruded into the right atrium (orange arrow); B: Acquired after surgery showed that the tumor thrombus was removed (white arrow).