GAREM2 (GRB2 Associated Regulator of MAPK1 Subtype 2) is a gene that regulates the MAPK/ERK signaling pathway, which is crucial for controlling cell growth, differentiation, and survival. It plays a role in mediating cellular responses to external signals such as growth factors and stress. GAREM2 is particularly important in cancer research, as disruptions in this pathway are often associated with tumor development.