Although most studies have concluded that NDRG2 acts as a tumor suppressor in breast cancer [26,64,65,66,67,68,69,70,71,72,73,74] (Table 1), a single study has described NDRG2 as having both suppressor and promoter functions depending on the subtype of breast cancer [75]. The gene discussed is NDRG2; the disease is neoplasm.