PTPRF and triple-negative breast carcinoma: Further clustering analysis on the triple-negative breast cancer transcriptome revealed additional triple-negative breast cancer (TNBC) six subtypes: basal-like 1 (BL1), basal-like 2 (BL2), immune-modulatory (IM), mesenchymal-like (M), mesenchymal stem-like (MSL), and luminal androgen receptor (LAR) [16].