PRL and cancer: Furthermore, at the KEGG level 3, there were significant differences in Amoebiasis, Prolactin signaling pathway, Lysosome, Apoptosis, N_Glycan biosynthesis, and Carotenoid biosynthesis, MicroRNAs in cancer, Retinol metabolism, Phenylalanine metabolism, Phenazine biosynthesis, Styrene degradation, MAPK signaling pathway-yeast, Pertussis, Tryptophan metabolism, Glycosaminoglycan degradation, Phenylalanine metabolism, Lysosome, Phenazine biosynthesis, Styrene degradation, Glycosaminoglycan degradation, and Pertussis (p < 0.05).