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Updated: Sep 12, 2025
Quantitation of Protein Expression and Co-localization Using Multiplexed Immuno-histochemical Staining and Multispectral Imaging
Published on: April 8, 2016
Breast myoepithelial markers: Problems and pitfalls for the practicing pathologist.
S Emily Bachert1, Elle Chapel2, Stuart J Schnitt3
1Department of Pathology, Brigham and Women's Hospital and Harvard Medical School, Boston, MA, USA.
Myoepithelial cell (MEC) markers in breast pathology help differentiate lesions. Understanding exceptions where MEC layers are absent or present in malignant lesions is crucial for accurate diagnosis.
Area of Science:
- Breast Pathology
- Immunohistochemistry
- Oncology
Background:
- Myoepithelial cell (MEC) markers are vital in breast pathology.
- MEC layers typically distinguish benign/in situ from invasive carcinomas.
- Exceptions exist, complicating diagnosis.
Purpose of the Study:
- Review exceptions in MEC layer presence/absence.
- Focus on benign/in situ lesions with reduced/absent MECs.
- Examine malignant lesions with MEC components.
Main Methods:
- Literature review of immunohistochemical studies.
- Analysis of diagnostic criteria for breast lesions.
- Focus on MEC marker utility and limitations.
Main Results:
- Some benign and in situ lesions lack MEC layers.
- Malignant lesions can contain MEC components.
- Diagnostic challenges arise from these variations.
Conclusions:
- Understanding MEC layer exceptions is critical for accurate breast cancer diagnosis.
- Immunohistochemistry for MEC markers requires careful interpretation.
- Further research may clarify atypical presentations.
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