Fig. 2

Computed tomography images. a Before treatment, 8.6-cm-diameter tumor infiltrating the abdominal wall, small intestine, and retroperitoneum. b After four cycles of chemotherapy, the tumor slightly shrank to 6.9 cm in diameter. c After eight cycles of chemotherapy, the tumor enlarged to 10 cm in diameter. d After radiotherapy, the tumor reduced to 6.6 cm in diameter with intratumor liquefaction degeneration