Table 4. Association between HER2 status and molecular classification.
Linear‐by‐linear test was performed.
HER2 tests were not conducted because of insufficient tumor cells.
Fisher's exact tests were performed.
Abbreviations: Amp, amplified; EBV, Epstein‐Barr virus; EMT, epithelial‐mesenchymal transition; IHC, immunohistochemistry; MSI+, microsatellite instability high; Nonamp, nonamplified; SISH, silver in situ hybridization.