Fig. 2

Clinical imaging in the course of treatment. After administration of CAPOX, the tumor did not shrink, but it started to shrink after capecitabine and radiotherapy. After the administration of nivolumab, the large tumor almost disappeared on imaging. A Colonoscopy, axial MRI, and sagittal PET images before treatment. B Colonoscopy, axial MRI, and sagittal PET images after CAPOX administration. C Colonoscopy images after capecitabine administration and radiotherapy. D Colonoscopy, axial MRI, and sagittal PET images after nivolumab administration