CYP4Z1 and invasive ductal breast carcinoma: CYP4Z1 was strongly expressed in 148 cases of invasive ductal carcinoma (83.1%), 13 cases of invasive lobular carcinomas (100%), 12 cases of intra-ductal carcinomas (85.7%), five cases of mucinous adenocarcinomas (83.8%), two cases of invasive papillary carcinomas (100%), 2 lobular carcinoma in situ (100%) and two cases of invasive apocrine carcinoma (100%) (Figure 3).