Adenomyoepithelioma of the breast

{{Infobox medical condition (new)

| name = Adenomyoepithelioma of the breast

| synonyms = Adenomyoepithelioma

| image = Adenomyoepithelioma - very high mag.jpg

| caption = Micrograph of an adenomyoepithelioma. H&E stain.

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| field = Pathology

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An adenomyoepithelioma of the breast is a rare tumour in the breast composed of glandular elements (adeno-) and myoepithelial cells. It is usually benign;{{Cite journal | last1 = Howlett | first1 = DC. | last2 = Mason | first2 = CH. | last3 = Biswas | first3 = S. | last4 = Sangle | first4 = PD. | last5 = Rubin | first5 = G. | last6 = Allan | first6 = SM. | title = Adenomyoepithelioma of the breast: spectrum of disease with associated imaging and pathology. | journal = AJR Am J Roentgenol | volume = 180 | issue = 3 | pages = 799–803 |date=Mar 2003 | doi = 10.2214/ajr.180.3.1800799| pmid = 12591699 }} however, there are reports of malignant behaviour.{{Cite journal | last1 = Zizi-Sermpetzoglou | first1 = A. | last2 = Vasilakaki | first2 = T. | last3 = Grammatoglou | first3 = X. | last4 = Petrakopoulou | first4 = N. | last5 = Nikolaidou | first5 = ME. | last6 = Glava | first6 = C. | title = Malignant adenomyoepithelioma of the breast--case report. | journal = Eur J Gynaecol Oncol | volume = 30 | issue = 2 | pages = 234–6 | year = 2009 | pmid = 19480267 }}

The histomorphologic appearance can mimic invasive ductal carcinoma, the most common type of invasive breast cancer.