ERBB2 and invasive ductal breast carcinoma: We report the case of a 66-year-old woman with a history of left breast invasive ductal carcinoma (Bloom-Richardson grade II, score 7) with a 3-cm primary tumor and 3/19 axillary lymph nodes involved (pT2N1), and HER2 amplification detected by fluorescence in situ hybridization, who presented with a right lower lobe pulmonary nodule suspicious for metastasis.