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Invasive breast cancer: Current perspectives and emerging views
Eric Ka Ho Shea1,2, Valerie Cui Yun Koh2, Puay Hoon Tan3
1Department of Clinical Pathology, Tuen Mun Hospital, Tuen Mun, Hong Kong.
Pathology International
|February 11, 2020
Summary
This review details updates in invasive breast cancer classification, incorporating new histological entities and genetic insights. It highlights the evolving understanding of breast cancer pathogenesis and prognostic parameters.
Area of Science:
- Oncology
- Pathology
- Genetics
Background:
- Invasive breast cancer is a heterogeneous disease with diverse histological types.
- Current classification relies mainly on histopathology, with Invasive Carcinoma of No Special Type being most common.
- Emerging research focuses on genetic insights and the tumor microenvironment's role.
Purpose of the Study:
- To review updates in invasive breast cancer classification.
- To discuss new histological entities and genetic findings.
- To explore the role of tumor-infiltrating lymphocytes.
Main Methods:
- Review of current literature and recent advances in breast cancer research.
- Analysis of histopathological features and genetic alterations.
- Incorporation of the latest World Health Organization classification guidelines.
Main Results:
- The latest WHO classification integrates histologic and genetic findings.
- Medullary carcinomas are now part of Invasive Carcinoma of No Special Type with specific features.
- Tall cell carcinoma with reversed polarity is proposed as a distinct entity due to IDH2 mutations.
Conclusions:
- Breast cancer classification is evolving with new genetic and histopathological insights.
- Understanding tumor-infiltrating lymphocytes and the microenvironment is crucial.
- Updated classifications improve prognostic and predictive accuracy.
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