Fig. 5

Histological examination of the pancreatic tumor (a–f) and rectal tumor (g–l). Relatively uniform tumor cells were found arranged in an acinar and solid formation. Both specimens showed the same morphological and immunohistochemical pattern. a, g Hematoxylin-eosin stain (H&E). b, h Magnified H&E image. c, i Negative for CDX2. d, j Positive for CK7. e, k Positive for CK19. f, l Negative for CK20