In testicular torsion, which physical exam finding is most significant?

• A. Positive Prehn's sign
• B. Absence of cremasteric reflex
• C. Pulsatile mass in the scrotum
• D. Severe tenderness in the groin

Answer: (B)

In cases of testicular torsion, the absence of the cremasteric reflex is a highly significant physical exam finding. This reflex is a response that occurs when the inner thigh is lightly stroked, causing contraction of the cremaster muscle and elevation of the testis on the same side. In testicular torsion, the severe twisting of the spermatic cord compromises blood flow to the testicle, which disrupts normal reflex activity. Therefore, if the cremasteric reflex is absent, it strongly suggests that the testis may be compromised, compelling further urgent assessment and intervention.

While other findings such as severe tenderness in the groin or a positive Prehn's sign can be informative, they are not as definitive for diagnosing testicular torsion. A positive Prehn’s sign, which involves relief of pain upon elevating the affected testicle, is more commonly seen in cases of epididymitis. Likewise, while pulsatile mass may indicate other pathologies, it does not specifically validate testicular torsion. Thus, the absence of the cremasteric reflex is a critical indicator of testicular torsion, signaling the need for prompt surgical intervention to salvage the testis and prevent long-term complications.