Abstract
Carcinosarcomas (CS) of the prostate are very uncommon neoplasms defined by the admixture of malignant epithelial and mesenchymal components. We describe here two new examples of CS in two patients aged 66 and 77 years, the first without previous history of prostate adenocarcinoma and the second with a 5-year history of acinar type prostate adenocarcinoma. The diagnosis of CS was made on the cystoprostatectomy specimen in the first case and transurethral resection in the second case. Both biphasic tumours exhibited papillary areas of ductal differentiation and conventional adenocarcinoma in the epithelial component, as well as malignant fibrous histiocytoma and angiosarcomatous areas in the first case and solid, poorly differentiated epithelial areas with neuroendocrine features in the second case. Immunohistochemistry revealed over-expression of c-erb B2 in the papillary epithelial component of both cases, whereas the solid undifferentiated epithelial areas in the second patient expressed c-kit, CD10 and synaptophysin, thus conforming a very undifferentiated cell population. The angiosarcomatous component of the first case expressed CD31 and CD10. The clinical course of the cases was divergent; the first patient is free of disease after radical surgery and adjuvant therapy and the other died 5 months after the diagnosis of CS, having already developed liver metastases.
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Acknowledgements
The authors would like to thank Margarita Mainar, Elena Gonzalvo, Elena Rull and Cristina Durana for their technical assistance, and DAKO for contributing in the immunohistochemical studies. This work was supported by grants Red Temática del Cáncer, Instituto de Salud Carlos III, no. C03/10, FIS 01/1519 from Ministerio de Sanidad y Consumo and AECC de Barcelona.
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Perez, N., Castillo, M., Santos, Y. et al. Carcinosarcoma of the prostate: two cases with distinctive morphologic and immunohistochemical findings. Virchows Arch 446, 511–516 (2005). https://doi.org/10.1007/s00428-005-1239-x
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DOI: https://doi.org/10.1007/s00428-005-1239-x