Breast cancer is the most prevalent cancer among women. Over the years the overall survival has increased, with metastatic dissemination being one the most important prognostic factors. Currently, the presence of lymph node involvement or distant metastasis is diagnosed on imaging and core biopsy results. Yet, no technique to predict a cancer’s metastatic potential a priori is available. By incorporating magnetic resonance elastography (MRE) in a patient’s routine MRI scan the tumour interstitial fluid pressure, a factor associated with metastatic propensity, can be non-invasively measured. Preliminary results indicate a correlation between MRE measured tumour pressure and the cancer’s metastatic potential.