Abstract: The present invention relates to protein markers for ER-positive-like and ER-negative-like breast cancer. Methods for differentiating ER-positive-like and ER-negative-like breast cancer in a subject having breast cancer are provided, such methods including the detection of levels of a variety of biomarkers for ER-positive-like and ER-negative-like breast cancer. Compositions in the form of kits and panels of reagents for detecting the biomarkers of the invention are also provided.

Abstract: The present disclosure provides gene expression profiles that are associated with cancer, including certain gene expression profiles that differentiate between cancer that is at a high risk of recurrence. The gene expression profiles can be measured at the nucleic acid or protein level. The gene expression profiles can also be used to identify a subject for cancer treatment. Also provided are kits for use in predicting cancer recurrence and/or prognosing cancer and an array comprising probes for detecting the unique gene expression profiles associated with cancer.