Predicting oncotype DX recurrence scores using locally available immunohistochemical markers: experience in a district general hospital.

Locally available, cheaper alternatives to multigene assays to determine therapy in ER positive HER2 negative patients is of benefit both from patient management and financial perspectives. A model has been derived with high capability to predict RS scores accurately from linear combinations of predictive biomarkers in a district general hospital setting, which should show good properties when applied to other samples.