NR4A1 and invasive ductal breast carcinoma: Histological examination of the surgical specimen highlighted the presence of metastasis from an infiltrating ductal breast carcinoma with positive hormone receptors: Estrogen Receptors (MoAb SP1) 98%, Progesterone Receptors (MoAb 1E2) 95%, Cytoprolferative Activity (MoAb MIB-1) 10%, c-erbB2 (MoAb 4B5) score: 0.