ER, PgR, HER2 expression rates seen in Q-Probes
June 2020—With release of the latest Q-Probes study, titled “Expression Rates in Invasive Breast Carcinoma,” the CAP Quality Practices Committee fills a gap by providing data collected from a diverse set of 21 U.S. laboratories on the average frequency of various ER, PgR, and HER2 expression results.