Pathology (multiple US-guided cores)
Microscopic: mammary carcinoma consisting of moderate nuclear grade ductal cell component, exhibiting sheets and cords, infiltrating the surrounding stroma with productive fibrosis.
Immunohistochemistry: Strong positive (+++) for estrogen and progesterone receptors. Negative HER-2.
Conclusion: Invasive ductal carcinoma (NOS) grade II - left breast.