Abstract
Accurate identification of the primary site of a cancer is important to predict prognosis and select appropriate therapy. Approximately 10%–15% of cancers initially present as metastases to solid organs, body cavities, or lymph nodes. However, the primary site of the metastatic cancer is not always clinically apparent. About 3%–5% of all cancers are carcinomas of unknown primary, making this type of tumor one of the 10 most frequent cancers in the world.1–9 Even with autopsy, in a series published in 2005 by Al-Brahim et al., a primary site was identified in only 51% of 53 cases of metastatic cancer of unknown origin.9
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Jagirdar, J., Cagle, P.T. (2008). Primary Versus Metastatic Cancer: Gene Expression Profiling. In: Zander, D.S., Popper, H.H., Jagirdar, J., Haque, A.K., Cagle, P.T., Barrios, R. (eds) Molecular Pathology of Lung Diseases. Molecular Pathology Library, vol 1. Springer, New York, NY. https://doi.org/10.1007/978-0-387-72430-0_33
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DOI: https://doi.org/10.1007/978-0-387-72430-0_33
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