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This 66-year-old female had had a mass of increasing size in the left breast for many years. A modified radical mastectomy was performed. At that time, invading carcinoma was left around the subclavian artery and 9 of 9 axillary lymph nodes were found to contain metastases. Later, pleural effusions recurred despite radiation therapy. The patient died 3 months after surgery.
== Images ==
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File:IPLab7IDC1IPLab7IDC1b.jpg|This is a gross photograph of the surgical specimen of breast with infiltrating duct carcinoma. Note the tumor tissue under the area of the nipple. The tumor infiltrates in an irregular fashion into the breast parenchyma. Note the nipple retraction caused by this neoplasm.
File:IPLab7IDC2.jpg|These are sections of normal breast (lower) and breast tissue with infiltrating duct carcinoma (upper). Note the increased cellularity (increased blue staining due to the increased number of nuclei) in the tumor tissue.
File:IPLab7IDC3.jpg|This is a section of breast with small groups of carcinoma cells throughout the breast tissue and invading through the dermis.