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Myoepithelial Carcinoma of the Breast

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Part of the book series: Encyclopedia of Pathology ((EP))

Synonyms

Malignant myoepithelioma; Metaplastic carcinoma; Spindle cell carcinoma

Definition

A malignant lesion composed of myoepithelial cells with increased mitotic activity and expression of myoepithelial markers, such as high molecular weight cytokeratins, p63, smooth muscle actin, and others.

Clinical Features

  • Incidence

    Myoepithelial carcinomas of the breast represent an extremely rare and poorly understood entity of invasive breast cancer. The exact incidence of these tumors is unknown, partially due to the disputed definition. According to the actual WHO classification, myoepithelial carcinomas are a subgroup of metaplastic carcinoma (Reis-Filho et al. 2012). Under these assumptions, the incidence is probably significantly lower than <1%.

  • Age

    Myoepithelial carcinomas have been seen in all age groups from 25 to 81 years.

  • Sex

    Rare cases of myoepithelial carcinoma of the breast have been described in women. The incidence in male patients is not known.

  • Site

    A predominant site within...

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References and Further Reading

  • Fine, M. A., & Kurdek, L. A. (2016). An approach to the diagnosis of spindle cell lesions of the breast. Histopathology, 68, 33–44.

    Article  Google Scholar 

  • Reis-Filho, J. S., Lakhani, S. R., Gobbi, H., & Sneige, N. (2012). Metaplastic carcinoma. In S. R. Lakhani, I. O. Ellis, S. J. Schnitt, P. H. Tan, & M. J. van de Vijver (Eds.), WHO classification of tumours of the breast (pp. 119–124). IACR: Lyon.

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  • Schmitt, F., Tan, P. H., Dabbs, D., & Jones, L. (2012). Myoepithelial and epithelial–myoepithelial lesions. In S. R. Lakhani, I. O. Ellis, S. J. Schnitt, P. H. Tan, & M. J. van de Vijver (Eds.), WHO classification of tumours of the breast (pp. 119–124). IACR: Lyon.

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  • Schnitt, S. J., & Collins, L. C. (2009). Spindle cell lesions. In S. J. Schnitt (Ed.), Biopsy interpretation of the breast (pp. 323–343). Philadelphia: Lippincott Williams & Wilkins.

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  • Tan, P. H., & Ellis, I. O. (2013). Myoepithelial and epithelial–myoepithelial, mesenchymal and fibroepithelial breast lesions: Updates from the WHO Classification of Tumours of the Breast 2012. Journal of Clinical Pathology, 66, 465–470.

    Article  CAS  PubMed  Google Scholar 

  • Tavassoli, F. A., & Eusebi, V. (2009). Myoepithelial lesions. In F. A. Tavassoli & V. Eusebi (Eds.), Tumors of the mammary gland (pp. 249–262). Washington, DC: Armed Forces Institute of Pathology.

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  • Weidner, N., & Dabbs, J. D. (2012). Myoepithelial lesions of the breast. In D. J. Dabbs (Ed.), Breast pathology (pp. 307–323). Philadelphia: Saunders.

    Chapter  Google Scholar 

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Correspondence to Horst Bürger .

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Bürger, H. (2020). Myoepithelial Carcinoma of the Breast. In: Sapino, A., Kulka, J. (eds) Breast Pathology. Encyclopedia of Pathology. Springer, Cham. https://doi.org/10.1007/978-3-319-62539-3_4768

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  • DOI: https://doi.org/10.1007/978-3-319-62539-3_4768

  • Published:

  • Publisher Name: Springer, Cham

  • Print ISBN: 978-3-319-62538-6

  • Online ISBN: 978-3-319-62539-3

  • eBook Packages: MedicineReference Module Medicine

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