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Non-invasive breast carcinoma.

M C Posner1, N Wolmark

  • 1University of Pittsburgh, School of Medicine.

Breast Cancer Research and Treatment
|January 1, 1992
PubMed
Summary

Non-invasive breast cancer includes lobular carcinoma in-situ (LCIS) and ductal carcinoma in-situ (DCIS). LCIS is a risk marker, not a precursor, requiring only follow-up, while DCIS management needs further clinical trials.

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Area of Science:

  • Oncology
  • Breast Cancer Research

Background:

  • Non-invasive breast cancer encompasses two distinct conditions: lobular carcinoma in-situ (LCIS) and ductal carcinoma in-situ (DCIS).
  • Understanding the distinct natural histories and biological interpretations of LCIS and DCIS is crucial for appropriate patient management.

Purpose of the Study:

  • To describe the natural history of LCIS and DCIS.
  • To offer a biologic interpretation of available data for these non-invasive breast cancer entities.
  • To guide clinical decision-making regarding the management of these conditions.

Main Methods:

  • Review and interpretation of existing clinical data and biological information on LCIS and DCIS.
  • Analysis of the implications of current understanding for treatment strategies.

Main Results:

  • Lobular carcinoma in-situ (LCIS) is identified as a risk marker for invasive cancer, not a direct precursor, suggesting that operative intervention is unnecessary post-diagnosis.
  • Serial follow-up is recommended for LCIS.
  • Optimal treatment for ductal carcinoma in-situ (DCIS) should align with breast-preserving approaches, mirroring treatments for invasive breast cancer.

Conclusions:

  • LCIS diagnosis warrants serial follow-up rather than surgical intervention.
  • The management of DCIS requires careful consideration of breast-preserving therapies.
  • Further clinical trials are essential to establish optimal therapeutic strategies for intraductal carcinoma, avoiding reliance on potentially misleading retrospective data.

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