Which finding is most consistent with testicular torsion?

Which finding is most consistent with testicular torsion?

• A. Bilateral absence of cremasteric reflex
• B. Normal cremasteric reflex
• C. Unilateral absence of cremasteric reflex
• D. Thickened scrotal skin

Answer: (C)

Testicular torsion typically disrupts the reflex arc that causes the cremaster muscle to contract on the affected side. The cremasteric reflex is triggered by the ilioinguinal nerve (L1) sensing stimulation, leading to a contraction of the cremaster muscle via the genital branch of the genitofemoral nerve. When the testis twists, this reflex pathway is interrupted on the side of torsion, so the reflex is absent there while it remains present on the other side. Since torsion is usually unilateral, you see unilateral absence of the cremasteric reflex. This helps distinguish torsion from other acute scrotal conditions like epididymitis, which typically preserves the cremasteric reflex. A normal reflex argues against torsion, and bilateral absence would suggest a more global or different process. Thickened scrotal skin isn’t a typical hallmark of torsion.

Testicular torsion typically disrupts the reflex arc that causes the cremaster muscle to contract on the affected side. The cremasteric reflex is triggered by the ilioinguinal nerve (L1) sensing stimulation, leading to a contraction of the cremaster muscle via the genital branch of the genitofemoral nerve. When the testis twists, this reflex pathway is interrupted on the side of torsion, so the reflex is absent there while it remains present on the other side. Since torsion is usually unilateral, you see unilateral absence of the cremasteric reflex.

This helps distinguish torsion from other acute scrotal conditions like epididymitis, which typically preserves the cremasteric reflex. A normal reflex argues against torsion, and bilateral absence would suggest a more global or different process. Thickened scrotal skin isn’t a typical hallmark of torsion.