Does Ultrasound Guidance Axillary Incision Improve Sentinel Lymph Node Detection in Breast Cancer?

This study is testing whether using ultrasound guidance to make the underarm incision during breast cancer surgery improves the success rate of finding and removing the sentinel lymph node — the first node where cancer might spread. A better approach here could mean fewer repeat procedures. **You may be eligible if...** - You have breast cancer (tumour up to 5 cm, with no more than 3 lymph nodes involved, and no distant spread) - You are undergoing axillary (underarm) staging as part of your breast cancer surgery - Your armpit lymph nodes appear clear on examination before surgery - You are 18 or older **You may NOT be eligible if...** - You are under 18 - You have a previous history of breast cancer - You are pregnant - Your lymph nodes are already confirmed to contain cancer before surgery - Multiple lymph nodes are visibly involved or suspicious Talk to your doctor to see if this trial is right for you.