What is the role of the cremasteric reflex and Prehn sign in the evaluation of testicular torsion?

Updated: Aug 31, 2018
  • Author: Oreoluwa I Ogunyemi, MD; Chief Editor: Edward David Kim, MD, FACS  more...
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The cremasteric reflex is almost always absent or diminished on the affected side in patients with testicular torsion, and its presence may help to distinguish other causes of acute scrotal pain from testicular torsion. Case reports, however, have noted the opposite to be true. [22]

Although a negative Prehn sign (relief of pain with elevation of the testicle) is classically thought to be a predictor of torsion, this is unreliable for diagnosis.

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