Are there stages to carcinoma of unknown primary like there are with other cancers?

Are there stages to carcinoma of unknown primary like there are with other cancers?

Normally, cancers are staged based on the extent of how far they spread in your body. Carcinoma of unknown primary (CUP) has already spread to other areas of your body when it’s found. Because it’s not known where the cancer began or how long it’s been present, there’s no staging system for CUP.