Disease-free interval (DFI), disease-specific survival (DSS), overall survival (OS) and progression-free interval (PFI) were used to evaluate the correlation between mRNA expression levels and survival rates using the ‘survival’ and ‘forestplot’ packages in R. Subsequently, the correlation between ERBB2 and clinicopathological parameters such as tumour grade, stage and status was analysed using the ‘limma’ and ‘ggpubr’ packages in R. Here, ERBB2 is linked to neoplasm.