<prompt> tripple negative ductal invasive carcinoma of breast is ?medullary carcinomacolloidalbasal like invasivelobular  <response>: MEDULLARY CARCINOMA breast : High nuclear grade, aneuploidy, hormone receptors - nt, HER2neu overexpression -nt. Lymph node metastases -infrequent. Syncytial growth pattern and pushing borders - dt overexpression of adhesion molecules - intercellular cell adhesion molecule and E-cadherin - limit metastatic potential. HISTOLOGY : Solid, syncytium-like sheets of large cells with vesicular, pleomorphic nuclei, prominent nucleoli 4 75 of the tumor Frequent mitotic figures; Moderate to marked lymphoplasmacytic infiltrate surrounding and within the tumor. Pushing noninfiltrative border. Poorly differentiated. ref : bailey and love 27th ed 