L1CAM and colorectal carcinoma: In heterotypic three‐dimensional (3D) culture models, CRC and pancreatic cancer cells are chemotactically attracted to ENS neurons through neurotrophic factors such as NGF and glial cell line‐derived neurotrophic factor (GDNF), migrating along axons via adhesion molecules such as L1 cell adhesion molecule (L1CAM) and N‐cadherin.123, 124, 125