It is becoming increasingly clear that tumour cells recruit cells in their surrounding microenvironment to aid in their proliferation. Tumour-associated macrophages and stromal cells are now believed to play a prominent role in tumour growth. Some evidence points to the fact that iron is a key player in the complex interactions between cancer cells and the microenvironment. This talk will present a computational model of tumour growth investigating the role of iron and the tumour microenvironment in tumour progression. Furthermore, the talk will describe how data gathered from a bioprinter will be used to calibrate the model.