Discordance between Original and Central Laboratories in ER and HER2 Results in a Diverse, Population-Based Sample

Details

• Alternative Title:
  Breast Cancer Res Treat
• Personal Author:
  Griggs, Jennifer J. ; Hamilton, Ann S. ; Schwartz, Kendra L. ; Zhao, Weiqiang ; Abrahamse, Paul H. ; Thomas, Dafydd G. ; Jorns, Julie M. ; Jewell, Rachel ; Sibug Saber, Maria E. ; Haque, Reina ; Katz, Steven J.
• Description:
  Purpose
  
  To investigate the discordance between original and central laboratories in estrogen receptor (ER) status, in tumors originally deemed to be ER-negative, and in HER2 status in a diverse population-based sample.
  
  Methods
  
  In a follow up study of 1785 women with Stage I–III breast cancer diagnosed between 2005 – 2007 in the Detroit and Los Angeles County SEER registry catchment areas, participants were asked to consent to reassessment of ER (in tumors originally deemed to be ER-negative) and HER2 status on archival tumor samples approximately four years after diagnosis. Specimens (either slides or blocks) were centrally prepared and analyzed for ER and HER2 using standardized methods and the guidelines of the American Society of Clinical Oncology and the College of American Pathologists. Analyses determined the discordance between original and central laboratories.
  
  Results
  
  132 (31%) of those eligible for ER reassessment and 367 (21%) eligible for HER2 reassessment had archival blocks reassessed centrally. ER discordance was only 6%. HER2 discordance by immunohistochemistry (IHC) was 26%, but final HER2 results—employing FISH in tumors that were IHC 2+ at the central laboratory—were discordant in only 6%. Half of the original laboratories did not perform their own assays.
  
  Conclusions
  
  Discordance between original and central laboratories in two large metropolitan areas was low in this population-based sample compared to previously-reported patient samples. Centralization of testing for key pathology variables appears to be occurring in many hospitals. In addition, quality improvement efforts may have preceded the publication and dissemination of specialty society guidelines.
  
  
• Subjects:
  Adult Aged Aged, 80 And Over Biomarkers, Tumor Breast Neoplasms Clinical Laboratory Services Female Humans Immunohistochemistry In Situ Hybridization, Fluorescence Middle Aged Neoplasm Grading Neoplasm Staging Population Surveillance Receptor, ErbB-2 Receptors, Estrogen Reproducibility Of Results SEER Program Young Adult

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• Keywords:
  Breast Cancer Estrogen Receptor HER2 Pathology SEER Registry
• Source:
  Breast Cancer Res Treat. 161(2):375-384
• Pubmed ID:
  27900490
• Pubmed Central ID:
  PMC5902386
• Document Type:
  Journal Article
• Funding:
  K05 CA111340/CA/NCI NIH HHSUnited States/ ; N01PC54404/CA/NCI NIH HHSUnited States/ ; N01PC35145/CA/NCI NIH HHSUnited States/ ; N01PC35139/CA/NCI NIH HHSUnited States/ ; K01 DP000087/DP/NCCDPHP CDC HHSUnited States/ ; R01 CA139014/CA/NCI NIH HHSUnited States/
• Volume:
  161
• Issue:
  2
• Collection(s):
  CDC Public Access
• Main Document Checksum:
  urn:sha256:3fec1c7c51bae2942aff470be199197249d219f505e30ab71c4cb17de4e6e8d2
• Download URL:
  https://stacks.cdc.gov/view/cdc/158007/cdc_158007_DS1.pdf
• File Type:
  [PDF - 240.81 KB ]