The 70-gene signature (70GS) is a prognostic marker for patient survival that is used to guide treatment decisions. For a dataset of early-stage breast cancer patients, the 70GS were established retrospectively. We investigated the potential of DCE-MRI to stratify patient survival within the high-risk 70GS group. Eigentumor analysis and 3D lesion texture features from washin and post-contrast images were compared in survival analysis and hazard ratios were computed. Results show that the investigated features are able to significantly stratify survival, and suggest that radiomics of DCE-MRI may have complementary value to the 70-gene signature to reduce overtreatment.