Volume 65, Issue 1 pp. 9-23
Original Article

Differentiation and histogenesis of syringomatous tumour of the nipple and low-grade adenosquamous carcinoma: evidence for a common origin

Werner Boecker

Corresponding Author

Werner Boecker

Institute for Hematopathology, Reference Centre for Gynaeco- and Breast Pathology, Hamburg, Germany

Gerhard-Domagk-Institute of Pathology, University of Muenster, Münster, Germany

Address for correspondence: W Boecker and I Buchwalow, Reference Centre for Breast and Gynaecopathology, Institute for Haematopathology, Fangdieckstr. 75, 22547 Hamburg, Germany. e-mail: [email protected] and [email protected]Search for more papers by this author
Göran Stenman

Göran Stenman

Sahlgrenska Cancer Centre, Department of Pathology, University of Gothenburg, Gothenburg, Sweden

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Thomas Loening

Thomas Loening

Albertinen Pathology, Hamburg, Germany

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Mattias K Andersson

Mattias K Andersson

Sahlgrenska Cancer Centre, Department of Pathology, University of Gothenburg, Gothenburg, Sweden

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Hans-Peter Sinn

Hans-Peter Sinn

Institute of Pathology, University Clinic, Heidelberg, Germany

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Peter Barth

Peter Barth

Gerhard-Domagk-Institute of Pathology, University of Muenster, Münster, Germany

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Felix Oberhellmann

Felix Oberhellmann

Gerhard-Domagk-Institute of Pathology, University of Muenster, Münster, Germany

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Inge Bos

Inge Bos

Institute of Pathology, University of Lübeck, Lübeck, Germany

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Tobias Berg

Tobias Berg

Institute for Hematopathology, Reference Centre for Gynaeco- and Breast Pathology, Hamburg, Germany

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Zlatko Marusic

Zlatko Marusic

Department of Pathology, Clinical Hospital Centre Sestre Milosrdnice, Zagreb, Croatia

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Vera Samoilova

Vera Samoilova

Institute for Hematopathology, Reference Centre for Gynaeco- and Breast Pathology, Hamburg, Germany

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Igor Buchwalow

Corresponding Author

Igor Buchwalow

Institute for Hematopathology, Reference Centre for Gynaeco- and Breast Pathology, Hamburg, Germany

Address for correspondence: W Boecker and I Buchwalow, Reference Centre for Breast and Gynaecopathology, Institute for Haematopathology, Fangdieckstr. 75, 22547 Hamburg, Germany. e-mail: [email protected] and [email protected]Search for more papers by this author
First published: 02 January 2014
Citations: 40

Abstract

Aims

Syringomatous tumour of the nipple and low-grade adenosquamous carcinoma (LGAdSC) of the breast are regarded as distinct entities. To clarify the nature of these two lesions, we compared the expression of different lineage/differentiation markers in 12 syringomatous tumours of the nipple, nine LGAdSCs, and normal breast epithelium.

Methods and results

Using triple immunofluorescence labelling and quantitative RT-PCR for keratins, p63, and smooth muscle actin, we demonstrated that syringomatous tumour and LGAdSC contain p63+/K5/14+ tumour cells, K10+ squamous cells, and K8/18+ glandular cells, with intermediary cells being found in both lineages. Identical p63+/K5/14+ cells were also found in the normal breast duct epithelium.

Conclusions

Our data provide evidence that syringomatous tumour of the nipple and LGAdSC are identical or nearly identical lesions. They contain p63+/K5/14+ cells as the key cells from which the K10+ squamous lineage and the K8/18+ glandular lineage arise. On the basis of our findings in normal breast tissue and associated benign lesions, we suggest that p63+/K5/14+ cells of the normal breast duct epithelium or early related cells might play a key role in the neoplastic transformation of both syringomatous tumour and LGAdSC. We propose that the differentiation patterns found in both lesions reflect the early ontogenetic stages of the normal breast epithelium.

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