Carcinoma of Unknown Primary—Patient Version
Cancer of unknown primary (CUP) occurs when cancer cells have spread in the body and formed metastatic tumors but the site of the primary cancer is not known. Explore the links on this page to learn more about CUP, how it is treated, and clinical trials that are available.
PDQ Treatment Information for Patients
Causes & Prevention
NCI does not have PDQ evidence-based information about prevention of carcinoma of unknown primary.
NCI does not have PDQ evidence-based information about screening for carcinoma of unknown primary.