After a routine mammogram and subsequent ultrasound,a radiologist at the imaging center performed a core biopsy on a suspicious area. The pathology report indicated:
1.3 cm invasive ductal adenocarcinoma, grade 3, poorly differentiated with necrosis and chronic inflammation within the tumor.
After diagnosis, I secured an appointment with a surgeon at a regional nationally-known cancer center. After viewing my mammograms and the pathology report, he recommended a simple mastectomy with sentinel node biopsy. I had these procedures on Nov. 20. On my follow-up visit, the surgeon provided me with a copy of the cancer center's pathology report. This report indicated:
1.1 cm medullary carcinoma,surgical margins negative,ER/PR negative, HER2/neu negative, stage T1c NO Mx, lymph node shows no evidence of malignancy; comment: immunohistochemistry for low-molecular weight cytokeratin (5D3) to detect the presence of micrometastasis reveals no cytokeratin-positive cells.
My question is, "How could one pathology report show IDAC and the other Medullary cardinoma?"