[Gonadotropic function in female Cushing's syndrome (author's transl)]

Area of Science:

• Endocrinology
• Reproductive Medicine
• Oncology

Background:

• Cushing's syndrome is characterized by excessive cortisol production.
• Gonadotropic function is crucial for reproductive health.
• The impact of different Cushing's syndrome etiologies on gonadotropins requires clarification.

Purpose of the Study:

• To investigate gonadotropin (FSH and LH) levels in female patients with Cushing's syndrome.
• To assess the response to Luteinizing Hormone-Releasing Hormone (LH-RH) stimulation across different Cushing's etiologies.
• To determine if hypercorticism or specific hormonal imbalances (cortisol vs. androgens) primarily affect gonadotropic function.

Main Methods:

• Longitudinal study of 38 female patients with Cushing's syndrome over four years.
• Measurement of follicle-stimulating hormone (FSH) and luteinizing hormone (LH) levels.
• Administration of LH-RH stimulation tests to evaluate pituitary responsiveness.
• Assessment of hormonal changes before and after treatment for hypercorticism.

Main Results:

• Low levels of FSH and LH were observed in all patients regardless of Cushing's syndrome etiology.
• LH-RH stimulation revealed normal responses in adrenal hyperplasia and adenoma, but significantly blunted responses in adrenal carcinoma.
• Gonadotropic abnormalities normalized following successful reduction of hypercorticism.

Conclusions:

• Hypercortisolism, rather than androgens, appears to be the primary factor suppressing gonadotropic function in Cushing's syndrome.
• Cortisol's direct effect on the hypothalamic-pituitary-gonadal axis is a significant contributor to reproductive dysfunction in these patients.
• Effective management of hypercorticism is essential for restoring normal gonadotropic function.