CYP27A1 and neoplasm: ↑ Higher expression of salivary NUS1 and RCN1 in OSCC patients vs. healthy volunteers ↓ Lower expression of NAB2 (p = 0.0023), CYP27A1 (p = 0.0016), NPIPB4 (p = 0.0059), MAOB (p = 0.0009), and SIAE (p = 0.037) for the OSCC vs. non-tumor group