Estrogen receptor expression is high but is of lower intensity in tubular carcinoma than in well-differentiated invasive ductal carcinoma

Julie M. Jorns, Dafydd G. Thomas, Patrick N. Healy, Stephanie Daignault, Tammi L. Vickery, Jacqueline E. Snider, Elaine R. Mardis, Sherri R. Davies, Matthew J. Ellis, Daniel W. Visscher

Research output: Contribution to journalArticle

Abstract

Context. - Tubular carcinoma (TC) is a rare, luminal A subtype of breast carcinoma with excellent prognosis, for which adjuvant chemotherapy is usually contraindicated. Objective. - To examine the levels of estrogen receptor (ER) and progesterone receptor expression in cases of TC and well-differentiated invasive ductal carcinoma as compared to normal breast glands and to determine if any significant differences could be detected via molecular testing. Design. - We examined ER and progesterone receptor via immunohistochemistry in tubular (N = 27), mixed ductal/tubular (N = 16), and well-differentiated ductal (N = 27) carcinomas with comparison to surrounding normal breast tissue. We additionally performed molecular subtyping of 10 TCs and 10 ductal carcinomas via the PAM50 assay. Results. - Although ER expression was high for all groups, TC had statistically significantly lower ER staining percentage (ER%) (P = .003) and difference in ER expression between tumor and accompanying normal tissue (P = .02) than well-differentiated ductal carcinomas, with mixed ductal/tubular carcinomas falling between these 2 groups. Mean ER% was 79%, 87%, and 94%, and mean tumor-normal ER% differences were 13.6%, 25.9%, and 32.6% in tubular, mixed, and ductal carcinomas, respectively. Most tumors that had molecular subtyping were luminal A (9 of 10 tubular and 8 of 10 ductal), and no significant differences in specific gene expression between the 2 groups were identified. Conclusions.-Tubular carcinoma exhibited decreased intensity in ER expression, closer to that of normal breast parenchyma, likely as a consequence of a high degree of differentiation. Lower ER% expression by TC may represent a potential pitfall when performing commercially available breast carcinoma prognostic assays that rely heavily on ER-related gene expression.

Original languageEnglish (US)
Pages (from-to)1507-1513
Number of pages7
JournalArchives of Pathology and Laboratory Medicine
Volume138
Issue number11
DOIs
StatePublished - Nov 1 2014

ASJC Scopus subject areas

  • Pathology and Forensic Medicine
  • Medical Laboratory Technology

Fingerprint Dive into the research topics of 'Estrogen receptor expression is high but is of lower intensity in tubular carcinoma than in well-differentiated invasive ductal carcinoma'. Together they form a unique fingerprint.

  • Cite this

    Jorns, J. M., Thomas, D. G., Healy, P. N., Daignault, S., Vickery, T. L., Snider, J. E., Mardis, E. R., Davies, S. R., Ellis, M. J., & Visscher, D. W. (2014). Estrogen receptor expression is high but is of lower intensity in tubular carcinoma than in well-differentiated invasive ductal carcinoma. Archives of Pathology and Laboratory Medicine, 138(11), 1507-1513. https://doi.org/10.5858/arpa.2013-0621-OA