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Original Article
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Volume 321:790-793 September 21, 1989 Number 12
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Inhibin as a marker for granulosa-cell tumors
RE Lappohn, HG Burger, J Bouma, M Bangah, M Krans, and HW de Bruijn

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Abstract

Inhibin is a peptide hormone normally produced by ovarian granulosa cells. It reaches a peak of 772 +/- 38 U per liter in the follicular phase of the menstrual cycle and is undetectable in the serum of menopausal women. To determine whether measurements of serum inhibin levels would provide a biochemical marker of the presence or progression of ovarian granulosa-cell tumors and their metastases, we measured the serum immunoreactive inhibin concentrations in six women with such tumors. Three women had been treated by hysterectomy and bilateral salpingo-oophorectomy. In the two women with residual or recurrent disease, the serum inhibin levels were abnormally elevated 5 and 20 months before the clinical manifestations of recurrence became evident. The maximal concentrations approached 3000 U per liter. The serum inhibin level remained undetectable in one patient who was disease-free for 11 years. Serum inhibin concentrations were also elevated in three women with amenorrhea and infertility that resulted from small granulosa-cell tumors. After the removal of the tumors, the serum inhibin levels in these women became normal, and fertility returned. There was a significant negative correlation between the serum concentrations of inhibin and follicle-stimulating hormone, in a manner consistent with the autonomous production of inhibin by granulosa-cell tumors. We conclude that granulosa-cell tumors produce inhibin. Since serum inhibin levels reflect the size of the tumor, measurements of inhibin can be used as a marker for primary as well as recurrent disease.


Source Information

Department of Obstetrics and Gynecology, Groningen State University Hospital, the Netherlands.


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