HPRT1 and neoplasm: Significant expression increase from normal to tumor stomach tissues (p < 0.05) were observed in HPRT1 (p = 0.011) and 18S rRNA (p = 0.021), but not in ACTB (p = 0.058), GAPDH (p = 0.918), B2M (p = 0.740), or RPL29 (p = 0.208).