Lobular carcinoma in situ Quiz: Ace Your Exams

A 48-year-old woman presents to her breast surgeon to discuss the results of a core needle biopsy that was performed in the right upper outer breast after findings suspicious for malignancy were noted on routine mammographic screening. She has no history of breast masses or malignancy, and no abnormal breast discharge or axillary lymphadenopathy. There is no family history of breast or ovarian cancer. Temperature is 37 °C (98.6 °F), heart rate is 86 bpm, respirations are 16/min, and blood pressure is 120/80 mmHg. A well-healing incision site is noted over the right breast without signs of infection. No axillary lymphadenopathy is detected. Pathology shows that the breast parenchyma is predominantly glandular with no suspicious cystic or solid masses, but a solid proliferation of small cells with small, uniform, round-to-oval nuclei is identified with estrogen receptor positivity consistent with LCIS. The basement membrane is intact with no signs of invasion. Which of the following should be recommended?