The EMT-related genes were LRPPRC, AGR2, CLDN4, CRIP1, DSP, ELF3, JUP, KRT8, KRT18, KRT19, FAM102A, TACSTD2, EPCAM, PEBP1, PSMD8, RAN, SNRPC, SPTAN1, EZR, DDR1, MLPH, and WDR34. In which, gene SNRPC, upregulated in CTC clusters, is a metastatic novel biomarker in breast cancer. The gene discussed is KRT19; the disease is breast carcinoma.