51-year-old female was diagnosed with stage I, Grade I infiltrating duct carcinoma of the breast. Estrogen receptors were highly positive and Progesterone receptors negative. Based on these findings the expert advises that she receive adjuvant radiotherapy and hormonotherapy. The adjuvant hormonotherapy consist of initial treatment by Tamoxifen for 2 years, thereafter switched to an Aromatase Inhibitor. The expert also informs the patient about potential side effects of Tamoxifen treatment, which are not frequent and generally mild.