MME and ductal breast carcinoma in situ: DCIS-associated MECs exhibit altered gene expression profiles, including reduced levels of tumor-suppressive markers such as laminin-1, smooth muscle myosin heavy chain (SMMHC), CD10, cytokeratin 14 (CK14), p63, or calponin, along with increased expression of oncogenic factors like chemokine (C-X-C motif) ligand 14 (CXCL14) and αvβ6 integrin.