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Adenomyoepithelioma of the Breast: Spectrum of Disease with Associated Imaging and Pathology

D. C. Howlett1, C. H. Mason2, S. Biswas3, P. D. Sangle3, G. Rubin1 and S. M. Allan3

1 Department of Radiology, Eastbourne District General Hospital, Kings Dr., Eastbourne, East Sussex BN21 2UD, United Kingdom.
2 Department of Histopathology, Eastbourne District General Hospital, East Sussex BN21 2UD, United Kingdom.
3 Department of Breast Surgery, Eastbourne District General Hospital, East Sussex BN21 2UD, United Kingdom.



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  		Fig. 1A. —69-year-old woman with benign tubular adenomyoepithelioma. Lateral oblique mammogram shows circumscribed mass lying inferiorly in left breast (arrow). Benign calcifications are also present.

 


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  		Fig. 1B. —69-year-old woman with benign tubular adenomyoepithelioma. Sonogram of left breast confirms rounded and circumscribed solid nodule (calipers) in breast parenchyma.

 


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  		Fig. 1C. —69-year-old woman with benign tubular adenomyoepithelioma. Photomicrograph of histologic specimen of resected benign adenomyoepithelioma shows inner layer of epithelial cells (white arrow) and outer layer of myoepithelial cells (black arrow). (H and E, x100)

 


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  		Fig. 2A. —72-year-old woman with infiltrating ductal carcinoma arising in benign adenomyoepithelioma. Lateral oblique mammogram of left breast shows lobulated and ill-defined opacity lying just above nipple (arrow). No associated microcalcifications are evident.

 


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  		Fig. 2B. —72-year-old woman with infiltrating ductal carcinoma arising in benign adenomyoepithelioma. Sonogram of left breast confirms ill-defined hypoechoic solid mass (calipers) above nipple, suspicious for malignancy.

 


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  		Fig. 2C. —72-year-old woman with infiltrating ductal carcinoma arising in benign adenomyoepithelioma. Photomicrograph of resected specimen shows infiltrating ductal carcinoma (not otherwise specified) arising in benign adenomyoepithelioma. (H and E, x100)

 


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  		Fig. 3A. —74-year-old woman with myoepithelial carcinoma. Lateral oblique mammogram of right breast shows large, lobulated, and ill-defined mass (arrow) above and behind nipple.

 


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  		Fig. 3B. —74-year-old woman with myoepithelial carcinoma. Sonogram of right breast confirms presence of illdefined, hypoechoic, and solid mass with associated distal acoustic shadowing. Imaging features are suspicious for malignancy. D1 and D2 indicate caliper measurements.

 


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  		Fig. 3C. —74-year-old woman with myoepithelial carcinoma. Photomicrographs of histologic specimens of benign adenomyoepitheliomatous elements from tumor in right breast show inner epithelial and outer myoepithelial cell layers (C) and smooth muscle {alpha}-actin stain and immunoperoxidase technique that stains myoepithelial cell layer (arrow, D). (H and E, x100)

 


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  		Fig. 3D. —74-year-old woman with myoepithelial carcinoma. Photomicrographs of histologic specimens of benign adenomyoepitheliomatous elements from tumor in right breast show inner epithelial and outer myoepithelial cell layers (C) and smooth muscle {alpha}-actin stain and immunoperoxidase technique that stains myoepithelial cell layer (arrow, D). (H and E, x100)

 


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  		Fig. 3E. —74-year-old woman with myoepithelial carcinoma. Photomicrographs of histologic specimens show myoepithelial carcinoma in adenomyoepithelioma of right breast with spindle cell elements (E) and epithelioid cell elements (F). (H and E, x200)

 


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  		Fig. 3F. —74-year-old woman with myoepithelial carcinoma. Photomicrographs of histologic specimens show myoepithelial carcinoma in adenomyoepithelioma of right breast with spindle cell elements (E) and epithelioid cell elements (F). (H and E, x200)

 

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