Make the Diagnosis: Baffling Breast Cancer

(MedPage Today) -- Case Findings: A 56-year-old woman with recent diagnosis of stage II right breast cancer presents for post-operative therapy. After a mastectomy and sentinel lymph node biopsy, her final pathology evaluation shows 3-cm invasive tubular cancer. Estrogen and progesterone receptors are both negative, HER2 is negative, and there is no lymph node involvement. What is your diagnosis?
Source: MedPage Today Hematology/Oncology - Category: Hematology Source Type: news