What is the next step in management for a 55-year-old postmenopausal female, 10 weeks after adrenalectomy, with elevated testosterone?

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Persistent Hyperandrogenism After Adrenalectomy: Ovarian Source Investigation

This patient requires immediate pelvic MRI to identify an ovarian source of androgen excess, as the persistently elevated testosterone 10 weeks post-adrenalectomy indicates the adrenal gland was not the source of hyperandrogenism 1, 2.

Critical Context

A testosterone level of 332.96 ng/dL (approximately 11.5 nmol/L) is severely elevated and well above the virilization threshold of >5 nmol/L 1. The persistence of this elevation 10 weeks after adrenalectomy definitively excludes an adrenal source and points to an ovarian etiology.

Immediate Next Steps

1. Pelvic MRI (Preferred Over Ultrasound)

  • MRI has superior sensitivity for detecting small ovarian tumors that ultrasound commonly misses 2
  • Transvaginal ultrasound may be limited by bowel gas and can fail to identify small androgen-secreting tumors 2
  • Look specifically for:
    • Ovarian masses (even small 2-3 cm lesions can produce massive androgen excess)
    • Enhancing nodules in the adnexa
    • Signs of ovarian hyperthecosis

2. Complete Hormonal Panel

While imaging is being arranged, obtain:

  • DHEAS - should be normal/low if ovarian source (confirms non-adrenal origin) 3
  • LH and FSH - typically suppressed in androgen-secreting tumors 2
  • AMH - may be low in granulosa cell tumors 2
  • Repeat testosterone to confirm persistent elevation

3. GnRH Analogue Suppression Test (If Imaging Inconclusive)

If MRI fails to identify a clear ovarian mass:

  • Administer single-dose GnRH analogue (e.g., leuprolide)
  • Measure testosterone pre- and post-administration
  • Suppression of testosterone confirms ovarian source as it demonstrates LH-dependent androgen production 4
  • This is superior to venous sampling which has high technical failure rates 4

Differential Diagnosis Priority

Given the severity of elevation post-adrenalectomy, consider in order:

  1. Androgen-secreting ovarian tumor (most concerning)

    • Adult granulosa cell tumor (10% secrete androgens) 2
    • Leydig cell tumor 4
    • Hilus cell tumor 4
    • Sertoli-Leydig cell tumor

  2. Ovarian hyperthecosis (less likely with this degree of elevation but possible)

  3. Polycystic ovary syndrome (unlikely to cause this severe elevation in postmenopausal women)

Critical Pitfalls to Avoid

  • Do not assume the adrenalectomy was therapeutic - the persistence of hyperandrogenism proves otherwise
  • Do not rely solely on ultrasound - case reports demonstrate repeated failures to detect small ovarian tumors with ultrasound that were clearly visible on MRI 2
  • Do not delay imaging - testosterone >5 nmol/L requires urgent tumor exclusion 1
  • Do not trust frozen section pathology alone - permanent pathology with immunohistochemistry is essential as frozen sections can misdiagnose benign tissue 2

Definitive Management

Once ovarian source is confirmed:

  • Bilateral salpingo-oophorectomy is curative for postmenopausal women 5, 1, 2
  • Testosterone normalizes within weeks post-surgery 6
  • Hirsutism and other androgenic symptoms gradually improve, though voice deepening may persist 2
  • Long-term surveillance is required as some tumors (particularly granulosa cell tumors) can recur years later 2

The key clinical lesson: This patient's adrenalectomy was performed for the wrong indication - the ovaries were always the source 2, 6.

References

1
Research

Approach to Investigation of Hyperandrogenism in a Postmenopausal Woman.

The Journal of clinical endocrinology and metabolism, 2023

3
Guideline

recommendations for investigation of hyperandrogenism.

Annales d'endocrinologie, 2010

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