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  • Title: OVX1 as a marker for early stage endometrial carcinoma.
    Author: Xu FJ, Yu YH, Daly L, Anselmino L, Hass GM, Berchuck A, Rodriguez GC, Soper JT, Clarke-Pearson DL, Hollis D.
    Journal: Cancer; 1994 Apr 01; 73(7):1855-8. PubMed ID: 8137210.
    Abstract:
    BACKGROUND: Endometrial carcinoma is generally diagnosed only after the onset of postmenopausal bleeding. Although most patients with Stage I disease can be cured, the prognosis worsens significantly when the tumor is no longer confined to the uterine corpus. Serum CA 125 is elevated in only 10-20% cases of Stage I and II endometrial carcinoma. A serum tumor marker that can detect early stage endometrial cancer might aid in management of the disease. METHODS: An OVX1 double-determinant radioimmunoassay was used to detect an epitope on a high-molecular-weight mucinlike glycoprotein found in the sera of 45 patients with endometrial cancer. RESULTS: Apparently healthy persons had serum OVX1 antigen levels of 2.23 plus or minus 2.48 U/ml (mean +/- standard deviation). Elevated levels of OVX1 antigen (> 7.2 U/ml) were found in 5% of 184 healthy persons and in 64% of 45 patients with endometrial cancer. OVX1 antigen was elevated in 64% of 36 patients with Stage I, 50% of 2 patients with Stage II, 60% of 5 patients with Stage III, and each of 2 patients with Stage IV endometrial cancer, but only 8.6% of 58 patients with endometriosis. Elevation of serum OVX1 was found more frequently in patients with deep myometrial invasion and with poorly differentiated tumors (P < 0.01). CONCLUSIONS: The OVX1 antigen deserves further evaluation as a marker for early detection of endometrial cancers and as a prognostic factor for women with apparent early stage disease.
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