Department of Pathology, Sunnybrook Health Sciences Center and University of Toronto, Toronto, ON, Canada.
Breast Cancer Res Treat. 2009 Nov;118(1):131-7. doi: 10.1007/s10549-008-0295-8. Epub 2009 Feb 3.
Traditional prognostic markers for breast cancer include estrogen receptor (ER), progesterone receptor (ER) and HER2/neu. Negative staining for these three markers defines the 'triple-negative' phenotype. By adding markers for cytokeratin 5/6 and EGFR, triple-negative breast cancers can be divided into 'basal-like' and 'normal-like' subgroups. We conducted immuno-staining on a panel of 958 patients with breast cancer, using all five markers and we followed the patients for distal recurrence and death. We compared rates of distal recurrence in the basal-like and normal-like subgroups with that of women with ER-positive breast cancer. Only 16 of 958 women had normal-like breast cancers. These cancers resembled basal-like cancers in that they had a high proliferative index, but the women with normal-like breast cancers resembled ER-positive women in terms of distant recurrence. The addition of CK5/6 and EGFR to the standard panel (ER/PR/HER2/neu) defines a small subgroup of women with normal-like breast cancer. The prognosis of these women may be superior to that of basal-like breast cancers but firm conclusions cannot be made.
传统的乳腺癌预后标志物包括雌激素受体(ER)、孕激素受体(PR)和 HER2/neu。这三种标志物的阴性染色定义了“三阴性”表型。通过添加细胞角蛋白 5/6 和 EGFR 的标志物,三阴性乳腺癌可以分为“基底样”和“正常样”亚组。我们使用所有五种标志物对 958 例乳腺癌患者进行了免疫染色,并对这些患者进行了远端复发和死亡的随访。我们将基底样和正常样亚组与 ER 阳性乳腺癌患者的远端复发率进行了比较。958 名女性中仅有 16 名患有正常样乳腺癌。这些癌症在增殖指数方面与基底样癌症相似,但在远处复发方面,正常样乳腺癌患者与 ER 阳性女性相似。将 CK5/6 和 EGFR 添加到标准面板(ER/PR/HER2/neu)中可以定义一小部分具有正常样乳腺癌的女性。这些女性的预后可能优于基底样乳腺癌,但不能得出确定的结论。