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J Cutan Pathol. 2009 Nov;36(11):1206-9. doi: 10.1111/j.1600-0560.2009.01267.x.

Syringomatous adenoma of the nipple occurring within a supernumerary breast: a case report.

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University of Tennessee Department of Pathology, Knoxville, USA.


Originally described by Rosen in 1983, syringomatous nipple adenoma (SAN) is a tumor of disputed histogenesis, which can be problematic both diagnostically and therapeutically. It is a benign primary tumor of breast epithelium with histology similar to that of the syringoma. In the current case, we describe a 40-year-old female with this lesion occurring within a supernumerary breast. This case represents, to our knowledge, the first such reported case, and represents a significant finding as its presence could lend some confusion as to whether or not this represents a benign primary process of breast or a potentially infiltrative tumor of the skin.

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