About cancer of unknown primary (CUP) | Cancer Research UK
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About cancer of unknown primary (CUP)

Men and woman discussing unknown primary cancer

This section tells you about cancer of unknown primary (CUP). It is also called unknown primary tumour (UPT) or unknown primary cancer (UPC). It means cancer that started somewhere in the body, but your doctor doesn’t know where.

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Updated: 15 July 2014