Differences in race, molecular and tumor characteristics among women diagnosed with invasive ductal and lobular breast carcinomas.

Published

Journal Article

BACKGROUND: The dominant invasive breast cancer histologic subtype, ductal carcinoma, shows intrinsic subtype diversity. However, lobular breast cancers are predominantly Luminal A. Both histologic subtypes show distinct relationships with patient and tumor characteristics, but it is unclear if these associations remain after accounting for intrinsic subtype. METHODS: Generalized linear models were used to estimate relative frequency differences (RFDs) and 95% confidence intervals (95% CIs) for the associations between age, race, tumor characteristics, immunohistochemistry (IHC) and RNA-based intrinsic subtype, TP53 status, and histologic subtype in the Carolina Breast Cancer Study (CBCS, n = 3,182) and The Cancer Genome Atlas (TCGA, n = 808). RESULTS: Relative to ductal tumors, lobular tumors were significantly more likely to be Luminal A [CBCS RNA RFD: 44.9%, 95% CI (39.6, 50.1); TCGA: RFD: 50.5%, 95% CI (43.9, 57.1)], were less frequent among young (≤ 50 years) and black women, were larger in size, low grade, less frequently had TP53 pathway defects, and were diagnosed at later stages. These associations persisted among Luminal A tumors (n = 242). CONCLUSIONS: While histology is strongly associated with molecular characteristics, histologic associations with age, race, size, grade, and stage persisted after restricting to Luminal A subtype. Histology may continue to be clinically relevant among Luminal A breast cancers.

Full Text

Duke Authors

Cited Authors

  • Williams, LA; Hoadley, KA; Nichols, HB; Geradts, J; Perou, CM; Love, MI; Olshan, AF; Troester, MA

Published Date

  • January 2019

Published In

Volume / Issue

  • 30 / 1

Start / End Page

  • 31 - 39

PubMed ID

  • 30617775

Pubmed Central ID

  • 30617775

Electronic International Standard Serial Number (EISSN)

  • 1573-7225

Digital Object Identifier (DOI)

  • 10.1007/s10552-018-1121-1

Language

  • eng

Conference Location

  • Netherlands