ETHAN - ET for Male BC

This study (ETHAN) is looking at hormone therapy as a treatment for men with breast cancer. Male breast cancer is rare, and this trial aims to better understand how well hormone-blocking therapy works in men before surgery. **You may be eligible if...** - You are a man 18 or older with invasive breast cancer (stage I, II, or III) - You have not yet had surgery to remove the tumor - Your cancer is hormone receptor-positive (responds to estrogen or progesterone) and HER2-negative **You may NOT be eligible if...** - Your cancer is HER2-positive or hormone receptor-negative - You have already had surgery - Your cancer is stage IV (has spread to other parts of the body) Talk to your doctor to see if this trial is right for you.