Isolated Elevated FSH Does Not Warrant Routine Scrotal Ultrasound or Urology Referral in This Case
In a 66-year-old man with isolated elevated FSH but normal LH, testosterone, and SHBG who is not seeking fertility, neither scrotal ultrasound nor urology referral is indicated unless specific clinical concerns arise.
Rationale Based on Guidelines
The most recent male infertility guidelines 1, 2 clearly establish that hormonal evaluation and further andrological investigation are indicated in the context of infertility evaluation. The EAU 2025 guidelines 1 recommend investigating "all men belonging to couples seeking medical help for fertility problems" and performing "infertility evaluation in couples who have not conceived after 12 consecutive months of regular, unprotected intercourse."
Since your patient is not on testosterone replacement therapy and presumably not seeking fertility at age 66, the elevated FSH alone does not trigger the cascade of investigations outlined in infertility guidelines.
Understanding the Hormonal Pattern
Your patient's hormonal profile shows:
- Elevated FSH (isolated finding)
- Normal LH, testosterone, and SHBG
This pattern suggests:
- Possible primary testicular dysfunction affecting spermatogenesis specifically (FSH elevation reflects reduced spermatogonial numbers 1)
- However, the normal testosterone and LH indicate preserved Leydig cell function
- This is NOT pathological hypogonadism requiring intervention 3
Research shows that FSH levels are "negatively correlated with the number of spermatogonia" 1, and elevated FSH can occur with testicular impairment 4, 5. However, without symptoms of hypogonadism, fertility concerns, or testicular abnormalities on physical examination, this is an incidental finding.
When Ultrasound Would Be Indicated
Scrotal ultrasound should be reserved for specific clinical indications 6, not routine screening:
- Palpable testicular masses or asymmetry
- Suspected varicocele affecting fertility
- Azoospermia or severe oligospermia in fertility evaluation 4
- Testicular pain or other scrotal symptoms 6
- Very small testicular volume (<17 cc associated with higher azoospermia risk 4)
A prospective study found that routine scrotal ultrasound altered management in only 8% of patients (4 of 48), with clinical diagnosis being correct in 73% of cases 6. Ultrasound should be reserved for specific indications, not used routinely.
When Urology Referral Would Be Indicated
Urology/andrology referral is appropriate when:
- Active fertility concerns requiring evaluation 1, 2
- Pathological hypogonadism (low testosterone with symptoms AND elevated LH/FSH or low LH/FSH) 3
- Testicular masses or concerning physical findings
- Azoospermia or severe oligospermia requiring surgical sperm retrieval 2
Common Pitfalls to Avoid
- Over-investigating isolated FSH elevation: FSH can be elevated in older men without clinical significance when testosterone and LH are normal
- Confusing infertility workup with general endocrine evaluation: The extensive investigations outlined in guidelines 1, 2 are specifically for couples seeking fertility treatment
- Ordering ultrasound without clinical indication: This increases costs without changing management 6
What You Should Do Instead
- Document the finding in the medical record
- Perform or ensure recent physical examination of the testes (size, consistency, masses)
- Assess for symptoms of hypogonadism (libido, erectile function, energy, mood)
- Consider repeat hormonal testing in 3-6 months if there's any clinical concern, as guidelines recommend confirming abnormalities on at least two tests 1
- Reassure the patient if examination is normal and he has no symptoms
If the patient develops symptoms, has abnormal testicular examination findings, or expresses fertility concerns, then reconsider further evaluation at that time.