at least one of the four tumor-associated markers ( cea [ caranoembryonic antigen ] , ca 19-9 , ca 125 , and slex [ sialylated lewisx epitope ] ) was positive with the sera of breast ( 43 % ) , lung ( 64 % ) , ovarian ( 54 % ) , and colorectal ( 57 % ) cancer .
C0003320
antigen
C0003316
epitope