14 year old male with right testicular pain due to testicular torsion.
Findings: The left testicle (A) shows a normal size with normal echogenicity and color flow. On the right, the testicle is enlarged with diminished echogenicity and no color flow (B). Evaluation of the spermatic cord demonstrates a twisted cord “whirlpool sign”, a highly specific sign (C).
Technique: real time ultrasound images of the testicles using 12 mHz linear probe.