Consistently, in vitro experiments confirmed higher FGF5 expression in NPC cell lines compared to the immortalized nasopharyngeal epithelial cell line NP69, with HK1 and HNE-1 cells displaying the highest expression levels (Figure 3f), Transcriptome data from public databases also showed the same expression trend (Figure 3g). Here, FGF5 is linked to nasopharyngeal carcinoma.