ESR1 and breast carcinoma: Functional cancer proteomic data from The Cancer Proteome Atlas (TCPA, http://tcpaportal.org, accessed on 30 October 2020) now reveal that the ER+/HER2+ subtype was the highest FASN protein expressor compared to basal-like, HER2-enriched, and ER+/HER2-negative breast cancer groups.