Appendix Testis Torsion

  • Etiology: twisting of appendix testis
  • Imaging: no internal flow in appendix testis, increased peripheral color flow of torsed appendix testis, enlarged epidydimal head, reactive hydrocele, scrotal skin thickening
  • Clinical: blue dot sign in 33%, most common cause of an acute painful hemiscrotum in a child

Cases of Appendix Testis Torsion

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.