HER2-positive Breast Cancer Registry

This study is a registry — a large data collection effort — for patients with HER2-positive breast cancer (a subtype of breast cancer where cancer cells have high levels of a protein called HER2 that drives tumour growth). The goal is to gather real-world information about how these patients are treated and how they fare over time. **You may be eligible if...** - You have been diagnosed with HER2-positive breast cancer at any stage (Stage I through Stage IV) **You may NOT be eligible if...** - There are no exclusion criteria listed for this study — it appears to be broadly open to anyone with a HER2-positive breast cancer diagnosis Talk to your doctor to see if this trial is right for you.