High yield info Retractil and undecended teastis
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cryptorchidism AND retractile testis
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EAU paediatric urology guideline 2025 cryptorchidism retractile testes recommendations
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Retractile vs undescended testis (cryptorchidism): high-yield
| Feature | Retractile testis | Undescended testis (UDT) |
|---|---|---|
| Definition | Testis has descended normally but is pulled up by an exaggerated cremasteric reflex | Testis has failed to complete normal descent into the scrotum |
| Position on exam | Can be brought gently to the bottom of the scrotum and stays there temporarily after release | Cannot be brought into, or cannot remain in, the scrotum |
| Scrotum | Normal, well developed | Often underdeveloped or empty on affected side |
| Size/consistency | Usually normal | May be smaller/atrophic, especially if longstanding |
| Main issue | Risk of secondary ascent | Fertility, malignancy, torsion, and inguinal hernia risks |
| Management | No operation initially. Observe with regular examination until puberty | Refer to pediatric urology/surgery. Orchiopexy is required if persistent |
1. Retractile testis
- Common in young boys due to a brisk cremasteric reflex, especially in cold/anxious settings.
- Examine in a warm room with the child relaxed. Sweep from inguinal canal toward scrotum.
- A retractile testis is manipulable into the dependent scrotum and remains there briefly once the reflex relaxes.
- Do not treat with hormones or immediate surgery if truly retractile.
- It needs annual examination until puberty because it can undergo acquired ascent. The EAU notes a reported risk of secondary ascent up to about one-third and recommends yearly follow-up. The EAU pediatric urology guideline recommends no medical or surgical treatment for retractile testes, but regular follow-up until puberty. The AUA guideline similarly recommends checking testicular position at least annually.
Key distinction:
If it can be placed in the scrotum and stays there temporarily = retractile.
If it springs back immediately or cannot be positioned in the scrotum = treat as UDT/ascending testis.
- Bailey and Love's Short Practice of Surgery, 28th ed., p. 1581
2. Undescended testis / cryptorchidism
Definition: One or both testes are not in the scrotum after birth. Locations may be high scrotal, inguinal canal, intra-abdominal, ectopic, or nonpalpable/absent.
Natural history
- Some testes descend spontaneously in early infancy.
- A testis still undescended after 6 months corrected age is unlikely to descend spontaneously.
- Refer at that point. Do not wait for school age.
Why it matters
Persistent UDT is associated with:
- Subfertility/infertility, especially bilateral disease
- Testicular malignancy risk
- Torsion
- Inguinal hernia
- Testicular atrophy and psychological/cosmetic concerns
Histologic damage begins early, supporting timely correction.
- Bailey and Love's Short Practice of Surgery, 28th ed., p. 1581
Management
- Palpable UDT: orchiopexy, ideally between 6 and 12 months, and no later than 18 months. The EAU recommendation specifies surgery before 12 months where possible and by 18 months at the latest.
- Nonpalpable testis: examination under anesthesia, then diagnostic laparoscopy to find an intra-abdominal testis or establish absence/vanishing testis.
- Ultrasound is generally not useful before specialist referral, since it often does not change management for a nonpalpable testis.
- Hormonal therapy is not recommended solely to induce descent in unilateral UDT.
Red flags
- Bilateral nonpalpable testes in a newborn: urgent specialist evaluation for possible disorder of sex development and congenital adrenal hyperplasia.
- UDT with hypospadias, especially proximal hypospadias, also warrants evaluation for a disorder of sex development.
- A testis that was previously scrotal but is now persistently high is an acquired/ascending testis and needs referral.
One-line exam answer
Retractile testis can be manipulated into the scrotum and remains there temporarily, so observe annually; an undescended testis cannot remain in the scrotum and requires orchidopexy by 6-18 months to reduce adverse fertility-related effects and permit surveillance for malignancy.
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