MET and neoplasm: In particular, we observed increased MET mRNA and protein levels (Figure 3c; Figure S2a,b, Supporting Information), with a heterogeneity similar to that observed among MMTV‐R26Met tumors and reported in TNBC patients.[41, 42] MGT4, MGT11, and MGT13 (not MGT9) cell lines were capable of forming tumor spheroids when grown in self‐renewal conditions (Figure 3d,e).