1. Age \<18

2. History of prior chemotherapy

3. History of prior radiotherapy of the surrounding areas of the axilla.

4. Pregnancy

5. Contra indications for MRI such as pacemaker, aneurysm clips or severe claustrophobia.

6. Allergy to any of the ingredients of Gadofosveset (Vasovist® /Ablavar®)

7. Being unable to give informed consent in person

8. Acute or chronic severe renal insufficiency (glomerular filtration rate \<30 mL/min/1.73m2).

9. Acute renal insufficiency of any severity due to the hepato-renal syndrome or in the perioperative liver transplantation period.

Gadofosveset for Axillary Staging in Breast Cancer Patients