Preschooler with acute onset of left scrotal pain

US of torsion of the appendix testis
Transverse (above) and sagittal (below) US of the left testicle shows a round, mixed echogenicity lesion superior and medial to the left testicle that had no flow on color and spectral doppler US. The left epididymis and left testicle were normal in appearance with normal appearing blood flow.

The diagnosis was torsion of the appendix testis on the left.