[Importance of the tissue polypeptide antigen level in neoplastic patients. Its correlation with other tumor markers].

In order to know the behavior of the tissue polypeptide antigen (TPA) as a tumor marker, the authors determine its amount in serum by means of radioimmunoassay (TPA Prolifigen RIA) in 441 patients having respiratory, digestive, urogenital, hematopoietic, mammary and other malignant tumors. The obtained results indicate that: TPA has no tumor specificity; however it increases in tumors without any other known tumor marker. TPA has no diagnostic value, but it is useful for the following up of digestive, mammary, respiratory, ovarian and testicular cancer; amounts of TPA comprised between 90 and 120 U/l are not specific and have no clinical significance; and it is very useful the simultaneous determination of CEA and TPA in the respiratory, digestive and mammary malignant neoplasms to help the clinical data in the evaluation of tumor mass (CEA) and tumor activity (TPA) without indication of tumor localization.