Fig. 3

Peritoneal nodule emerged in the abdomen. a, b, c No tumor lesion was detected before the start of treatment with nivolumab (a), at the 3-month (b) and 5-month assessment (c). d At the 8-month assessment, a new peritoneal nodule was detected in the abdomen (arrowhead). The nodule measured 44 × 21 mm in size. e At the 12-month assessment, the nodule had decreased in size and an opacity could be seen next to the intestinal tract