They found that ApoStreamTM-enriched cancer cells from cell lines expressed AR-V7 in both epithelial CTCs (detected in 6/10 patients in CD45− [median: 9.5] and in 7/10 CD45+ [median: 1] cells and mesenchymal CTCs (detected in 5/10 patients for both CD45− [median: 0.5] and CD45+ [median: 0.5] cells) [55]. The gene discussed is PTPRC; the disease is cancer.