The levels of tumour-associated trypsin inhibitor (TATI), CA 125 and CEA were measured in ovarian cyst fluids from 21 patients. TATI in cyst fluid was immunologically and physicochemically similar to the peptide originally isolated from the urine of a patient with ovarian cancer. Mucinous cysts contained significantly higher levels of TATI than did serous cysts. Immunohistochemically TATI was localized in the apical parts of cells of mucinous ovarian cysts. These results suggest that this tumour-associated peptide is actually produced by a tumour. Like TATI, CEA occurred at higher concentrations in mucinous than in serous cyst fluids, whereas CA 125 was found in higher concentrations in serous than in mucinous cyst fluids. The concentrations of these tumours markers in cyst fluids did not correlate with circulating levels of the same markers. In spite of the very high levels of all these tumour markers in benign cyst fluids, serum levels were normal or only slightly elevated. Clearly elevated serum levels occurred only in patients with malignant tumours. Cyst fluid levels of these tumour markers could not be used to distinguish between benign and malignant tumours.
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| http://dx.doi.org/10.1038/bjc.1987.175 | DOI Listing |
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