Volume 48, Issue 1 , Pages 72-75, March 2009
Secondary Amenorrhea with Low Serum Luteinizing Hormone and Follicle-stimulating Hormone Caused by an Inhibin A- and Inhibin B-producing Granulosa Cell Tumor
Article Outline
Summary
Objective
Here, we report a case of secondary amenorrhea with low serum luteinizing hormone and follicle-stimulating hormone levels due to an inhibin A- and inhibin B-producing granulosa cell tumor of the ovary.
Case Report
A woman aged 26 with infertility, secondary amenorrhea and low levels of gonadotropin was referred to us as a case of hypothalamic amenorrhea. There was a mass measuring 56 × 41mm in her right adnexa. We were suspicious of malignancy and checked the tumor marker levels. Laboratory findings showed high levels of inhibin A and B. She underwent an exploratory laparotomy. Microscopic examination revealed an adult granulosa cell tumor. Eighteen days after excision, she had spontaneous menstruation with normal levels of follicle-stimulating hormone and luteinizing hormone.
Conclusion
A granulosa cell tumor secretes inhibin A and B, which suppress follicle-stimulating hormone and luteinizing hormone release through a central mechanism. This leads to amenorrhea, which can be misdiag-nosed as hypothalamic amenorrhea. Inhibin-producing ovarian tumors must be considered in the assessment of patients with apparent hypothalamic amenorrhea.
Key Words: follicle-stimulating hormone , granulosa cell tumor , inhibin A , inhibin B , luteinizing hormone
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References
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PII: S1028-4559(09)60040-1
doi:10.1016/S1028-4559(09)60040-1
© 2009 Taiwan Association of Obstetric & Gynecology. Published by Elsevier Inc. All rights reserved.
Volume 48, Issue 1 , Pages 72-75, March 2009
