In a 55-year-old postmenopausal woman, a serum testosterone level of 232 ng/dL measured 10 weeks after surgery is markedly elevated; what are the possible causes and recommended next steps?

Markedly Elevated Postmenopausal Testosterone: Urgent Evaluation for Androgen-Secreting Tumor

A testosterone level of 232.86 ng/dL (approximately 8 nmol/L) in a postmenopausal woman 10 weeks after surgery is severely elevated and highly suspicious for an androgen-secreting ovarian tumor, ovarian hyperthecosis, or Leydig cell hyperplasia—this requires immediate comprehensive evaluation to rule out malignancy.

Primary Differential Diagnosis

The testosterone level is approximately 4-5 times the upper limit of normal for postmenopausal women, which creates a critical diagnostic situation. Based on the most recent evidence, the key possibilities include:

• Androgen-secreting ovarian tumors (steroid cell tumors, granulosa cell tumors, Leydig cell tumors) 1, 2, 3, 4
• Bilateral Leydig cell hyperplasia 5, 1
• Ovarian hyperthecosis 6
• Residual ovarian tissue (if the surgery was not bilateral oophorectomy)

Critical Next Steps

1. Immediate Biochemical Workup

Obtain the following labs urgently 7:

• DHEAS: If >600 µg/dL (16,000 nmol/L), suspect adrenal adenoma and obtain abdominal CT immediately 7
• Free testosterone and SHBG: To confirm true androgen excess 7
• Androstenedione: May be dissociated from testosterone 7
• 17-hydroxyprogesterone: To exclude 21-hydroxylase deficiency 8, 7
• LH and FSH: Should be suppressed if tumor present 8

2. Imaging Studies - Critical Sequence

The imaging approach must be aggressive given the severity:

• Pelvic MRI with contrast is the preferred initial imaging modality—it has superior sensitivity over ultrasound for detecting small ovarian tumors 1, 2
• Transvaginal ultrasound is insufficient as a standalone test; multiple recent cases show normal ultrasounds despite confirmed tumors 1, 3
• Abdominal CT to evaluate adrenal glands if DHEAS is elevated 7

Important caveat: Normal imaging does NOT exclude an androgen-secreting tumor. Recent case series from 2025-2026 demonstrate multiple instances where CT, MRI, and ultrasound were all unremarkable, yet bilateral oophorectomy revealed Leydig cell hyperplasia or steroid cell tumors 1, 3, 4.

3. Clarify Surgical History

Determine exactly what surgery was performed 10 weeks ago:

• If bilateral salpingo-oophorectomy was performed, the elevated testosterone suggests either:

  • Incomplete removal of ovarian tissue
  • Adrenal source (check DHEAS urgently)
  • Exogenous androgen exposure

• If ovaries were preserved, this strongly suggests ovarian pathology requiring surgical intervention

4. GnRH Analog Suppression Test (Optional but Helpful)

If imaging is negative but clinical suspicion remains high, a GnRH analog stimulation test can help localize the source 6:

• Ovarian sources (hyperthecosis, tumors) are LH-dependent and will suppress with GnRH analogs
• Reduction in testosterone within 4 weeks confirms ovarian origin 6

Definitive Management Algorithm

If DHEAS >600 µg/dL:

• Urgent abdominal CT → If adrenal mass found → Surgical referral for adrenalectomy 7

If DHEAS Normal + Testosterone >4x Upper Limit:

1. Pelvic MRI with contrast
2. If mass identified → Proceed to bilateral salpingo-oophorectomy 1, 2, 3
3. If imaging negative but testosterone remains severely elevated:
   • Consider GnRH analog trial 6
   • Strongly consider diagnostic bilateral salpingo-oophorectomy given multiple 2025-2026 case reports showing tumors/hyperplasia despite negative imaging 1, 3, 4

Critical Clinical Pearls

Red flags for malignancy (from recent 2026 guidelines) 9, 10:

• Rapid symptom progression
• Virilization (clitoromegaly, voice deepening, male-pattern baldness)
• Testosterone >150-200 ng/dL in postmenopausal women
• New-onset symptoms after menopause

Common diagnostic pitfalls to avoid:

1. Do not rely on ultrasound alone—MRI is mandatory for adequate evaluation 1, 2
2. Do not be falsely reassured by normal imaging—bilateral oophorectomy may still be diagnostic and therapeutic 1, 3
3. Do not delay surgical evaluation if testosterone is >4x normal, even with negative imaging 4, 9
4. Frozen section pathology can be misleading—permanent pathology with immunohistochemistry is essential 2

Expected Outcomes Post-Oophorectomy

If ovarian source confirmed, testosterone normalizes within 1-4 weeks post-bilateral oophorectomy, with progressive improvement in hirsutism and other androgenic features 5, 1, 6, 3, 4. Notably, successful treatment of hyperandrogenism can also improve glycemic control in diabetic patients 5.

Long-term follow-up is mandatory as some tumors (particularly granulosa cell tumors) have risk of late recurrence 2.