The Clinicopathologic Features of Molecular Apocrine Breast Cancer.
- Author:
Yoon Jin CHA
1
;
Woo Hee JUNG
;
Ja Seung KOO
Author Information
1. Department of Pathology, Severance Hospital, Yonsei University Health System, Yonsei University College of Medicine, Seoul, Korea. kjs1976@yuhs.ac
- Publication Type:Original Article
- Keywords:
Breast neoplasms;
Molecular apocrine;
Immunohistochemistry
- MeSH:
Breast;
Breast Neoplasms;
Estrogens;
Humans;
Immunohistochemistry;
Keratins;
Phenobarbital;
Phenotype;
Prevalence;
Prognosis;
Receptor, Epidermal Growth Factor;
Receptor, erbB-2;
Receptors, Androgen
- From:Korean Journal of Pathology
2012;46(2):169-176
- CountryRepublic of Korea
- Language:English
-
Abstract:
BACKGROUND: To elucidate the clinicopathologic features and their implications on the immunohistochemistry in cases of molecular apocrine breast cancer (MABC). METHODS: Immunohistochemical (IHC) staining for estrogen receptor (ER), human epidermal growth factor receptor 2 (HER-2), cytokeratin (CK) 5/6, epidermal growth factor receptor (EGFR), androgen receptor (AR), gamma-glutamyltrasferase 1 (GGT1) and Ki-67 was performed on tissue microarray breast cancer samples from 204 patients. Phenotypes of breast cancer were divided based on the IHC status of ER, AR and GGT1 into the following: luminal type, ER positive and AR and/or GGT1 positive; basal type, ER, AR, and GGT1 negative; non-basal type, ER positive and AR and GGT1 negative; and MABC type, ER negative and AR and/or GGT1 positive. RESULTS: In our series of patients (n=204), there were 26 cases of MABC. Besides, there were 18, 60, and 100 cases of luminal type, basal type and non-basal type, respectively. The MABC demonstrated apocrine histology and a higher prevalence of HER-2 positivity than other phenotypes. With the basal type, the MABC manifested a more frequent expression of CK5/6 and EGFR and a higher Ki-67 index than other phenotypes (p<0.001). There were no significant differences in patient prognosis between the phenotypes of breast cancer. CONCLUSIONS: MABC are distinguishable from other phenotypes based on the apocrine histology and a higher expression rate of HER-2.
