FN1 and neoplasm: The results of which showed more cysts (pink circular plaques, marked by arrows) and shorter intestinal villi in the CRC + Fn group when compared to the control and CRC groups, while in the CRC + Fn + Cys group, there were noticeable structural changes of intestinal cavities, destruction of cupulae, and tumor invasion (marked by arrows) in the colons of the mice.