ERBB2 and invasive ductal breast carcinoma: 49 year-old Caucasian woman with a history of stage I (T1cN0M0) invasive ductal carcinoma (IDC), ER/PR positive, HER2 non-amplified, treated with lumpectomy and SLN evaluation, followed by adjuvant taxotere/cyclophosphamide (TC) chemotherapy for 4 cycles.