Moreover, high GREB1 expression may not be exclusive to MNA+ NB, as occasional MNA− NBs also express high GREB1 levels (e.g., NB69 cells), likely through distinct mechanisms and with oncogenic functions, such as is described in ER+ breast cancers and prostate adenocarcinomas (13–16). The gene discussed is GREB1; the disease is prostate adenocarcinoma.