Testicular ultrasound is done to:

  • Evaluate a mass or pain in the testicles.
  • Identify and monitor infection or inflammation of the testicles or epididymis.
  • Identify twisting of the spermatic cordcutting off blood supply to the testicles (testicular torsion).
  • Monitor for recurrence of testicular cancer.
  • Locate an undescended testicle.
  • Identify fluid in the scrotum (hydrocele), fluid in the epididymis (spermatocele), blood in the scrotum (hematocele), or pus in the scrotum (pyocele).
  • Guide a biopsyneedle for testicular biopsy when testing for infertility.
  • Evaluate an injury to the genital area.


No special preparation is needed for a testicular ultrasound.
If you are having a biopsy or another test during the ultrasound, you may need to sign a consent form.


You will need to remove all your clothes from the waist down and put on a gown before the test. You will be asked to lie on your back on a padded examination table. For most ultrasound exams, the patient is positioned lying face-up on an examination table that can be tilted or moved.

A clear gel is applied to the area of the body being studied to help the transducer make secure contact with the body and eliminate air pockets between the transducer and the skin. The radiologist then presses the transducer firmly against the skin and sweeps it back and forth over the area of interest.

When the examination is complete, the patient may be asked to dress and wait while the ultrasound images are reviewed.