[Elevated serum-sialyltransferase activity in human malignant diseases: a new diagnostic tool? (author's transl)].

: Sialyltransferase activity was estimated in serum samples of patients with cancer and controls using immobilized asialo-fetuin as the acceptor and cytidine-5'-monophospho [14C] sialic acid as the donor. The data suggest that increased enzyme activity can be found in more than 80% of the samples from patients with malignant diseases.