Patients with triple negative tumors according to a core biopsy scheduled to be treated with docetaxel plus carboplatin (i.e., no contraindications for the regimen) will be candidate for the study. After detailed information of study purposes, they will be asked to sign an informed consent Triple negative status is defined as ER <1% stained cells, PR <1% stained cells and HER2 negative (IHC of 0-1+ or or 2-3+ with FISH/CISH negative testing).