Both increased and decreased levels of lamin A/C have been observed in cancer and related to patient prognosis. The complexity of lamin A/C functions and signalling networks suggests that the role of lamin A/C in tumour progression may vary with stage of disease, tissue of origin, and mutational landscape of a given tumour. Possible functions for increased and decreased lamin A/C levels during tumour progression are depicted here, and warrant further investigation towards understanding the role of lamin A/C in cancer. Importantly, many of these lamin-related functions could contribute to multiple stages of cancer, but are each shown here only once for simplicity.