Figure 4: (A) In vivo imaging of peritoneal dissemination model of pancreatic cancer in the NOG mouse showed gradual expansion of abdominal bioluminescent signals throughout the experimental period. (B) Ex vivo imaging revealed the presence of bioluminescence signals in the liver, gastrointestinal tract, and kidneys. (C) The human cancer cell nest formed in the serous surface of intestine was positive for HLA class I-A,B,C. Original magnification, ×400.