Competition for space-oncogenic mutant cells vs normal cells
(PHYSorg.com Biology)

Cells in multicellular tissues adhere to each other. Epithelial tissues on the surface layer of the intestines and skin pack cells into a hexagonal (honeycomb) pattern, with cells adhering tightly to the six cells adjacent to them (Fig. 1). The whole tissue can be represented as a network, and body function is maintained by keeping this basic adhesion network intact.