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Chromosomal aberrations and genetic relations in benign, borderline and malignant phyllodes tumors of the breast: a comparative genomic hybridization study

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Abstract

Phyllodes tumors are not quite rare fibroepithelial neoplasms of the breast that show a broad spectrum of clinical behaviour. The molecular genetic features of the heterogenous groups of neoplasms have not been studied in detail yet. We have used comparative genomic hybridization to analyze chromosomal copy number changes in 36 cases of phyllodes tumors (including benign, borderline and malignant phyllodes tumors, 12 cases each). The average number of chromosome copy changes (range) in benign, borderline and malignant phyllodes tumors were 5.58 (0–20), 14.08 (3–23), and 12.42 (0–29) respectively. In benign phyllodes tumors the number of gains and losses was in balance (2.50 vs 3.08), while in borderline and malignant phyllodes tumors gains occurred more often than losses (9.25 vs 4.83, 9.5 vs 2.92). The result suggests the molecular cytogenetics of borderline and malignant phyllodes tumors is similar, and the most striking difference with benign phyllodes tumors is an increased number of chromosomal gains in a nonrandom distribution. Gains of 4q12 seem especially to be involved in the progression of benign to borderline and malignant phyllodes tumors, possibly because of overexpression of oncogenes at these loci.

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Acknowledgements

The authors gratefully acknowledge Dr. Khalid Aziz (native language speaker) of Tianjin Medical University and Mr. Jianzhong Zhang of Beijing 306 Military Hospital for their helps in language work. This research project was supported by the Scientific and Technological Development Fund (no. 020219) of Tianjin Educational Committee, Tianjin, China.

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Author notes

  1. Shuhua Lv

    Present address: Pathologic Department, Second Teaching Hospital of Tianjin University of Traditional Chinese Medicine, Tianjin, China

  2. Li Wei

    Present address: Laboratory of Kidney Physician Department, General Hospital, Tianjin Medical University, Tianjin, China

Authors and Affiliations

  1. Breast Cancer Research Key Laboratory of National (Education Ministry), Cancer Institute and Hospital, Tianjin Medical University, Huan Hu Xi Road, Ti Yuan Bei, He Xi District, Tianjin, 300060, China

    Shuhua Lv, Yun Niu & Li Wei

  2. Molecular Cytogenetics Laboratory, Chinese National Human Genome Center, Beijing, China

    Qingjie Liu, Xiaowei Wang & Yan Chen

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  1. Shuhua Lv
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  2. Yun Niu
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  3. Li Wei
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  4. Qingjie Liu
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  5. Xiaowei Wang
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  6. Yan Chen
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Correspondence to Yun Niu.

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Lv, S., Niu, Y., Wei, L. et al. Chromosomal aberrations and genetic relations in benign, borderline and malignant phyllodes tumors of the breast: a comparative genomic hybridization study. Breast Cancer Res Treat 112, 411–418 (2008). https://doi.org/10.1007/s10549-007-9876-1

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  • DOI: https://doi.org/10.1007/s10549-007-9876-1

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