A breast metaplastic carcinoma that is characterized by the presence of four cell types (basaloid, intermediate, epidermoid, and mucinous) in varying proportions. [ url:https://www.ncbi.nlm.nih.gov/pmc/articles/PMC5758243/ http://purl.obolibrary.org/obo/ECO_0007645 ]
Synonyms: Mucoepidermoid carcinoma of the breast