The Oncotype DX Recurrence Score Is Correlated With a Composite Index Including Routinely Reported Pathobiologic Features.

In a series of 177 breast carcinomas, we found that the Oncotype DX Recurrence Score (RS) was correlated with six pathobiologic features: estrogen receptor, progesterone receptor, and human epidermal growth factor receptor 2 status, and the three components of the Nottingham tumor grade. The RS also correlated with a composite index (the Breast Cancer Prognostic Score or BCPS) comprising the same six parameters. Categorical concordance was 56% and 66% using conventional and TAILORx cutoffs, respectively. Our data show that a composite prognostic index can be constructed from routinely reported breast tumor features that captures much of the information provided by the Oncotype assay at no added cost. [ABSTRACT FROM AUTHOR]