CK: cytokeratin; CEA: carcinoembryogenic antigen; CD10: cluster of differentiation 10; P63: tumor protein 63; BerEP4/EpCAM: Epithelial Cell Adhesion Molecular; Pax-8: paired box gene 8; UTI: urinary tract infection; PSA: prostatic-specific antigen; CA125: cancer antigen 125. The gene discussed is PAX8; the disease is bacterial urinary tract infection.