Cancers of unknown primary (CUP) , represent 1-3\% of all cancers and is an enigmatic disease where the primary site of origin cannot be determined.
<clarity> Cancers of unknown primary (CUP) , represent 1-3\% of all cancers and is an enigmatic disease where the primary site of origin cannot be determined.
Cancers of unknown primary (CUP) , represent 1-3\% of all cancers and is an enigmatic disease where the primary anatomical site of tumor origin cannot be determined.