FADS2 and neoplasm: Based on gene expression profiles and histological classification, BRCA can be categorized into luminal A, luminal B, human epidermal growth factor receptor 2 (Her2), positive and triple-negative breast cancer.[35–37] To further determine the relationship between SCD or FADS2 expression and tumor molecular subtypes, we assessed the association between SCD (Fig. 2A, Fig. S1, Supplemental Digital Content, http://links.lww.com/MD/M965) or FADS2 (Fig. 2B, Fig. S2, Supplemental Digital Content, http://links.lww.com/MD/M966) expression and pan-tumor subtypes using the TISIDB database.