Testicular Ultrasound

Definition

Testicular ultrasound is an imaging test that examines the testicles and other structures inside the scrotum.

Alternative Names

Scrotal ultrasound; Testicular sonogram

 How the test is performed

You lie on your back with your legs spread. The sonographer drapes a cloth across your thighs under the scrotum. The scrotal sac will be slightly raised, with the testicles lying side by side.

A gel is applied to the scrotal sac to help transmit the sound waves. A handheld probe (the ultrasound transducer) is then moved over the scrotum. High-frequency sound waves are reflected off structures in the scrotum to create a picture.

How to prepare for the test

No special preparation is needed for this test.

How the test will feel

There is little discomfort. The conducting gel may feel slightly cold and wet.

Why the test is performed

The ultrasound is done to help determine why one or both testicles have become larger, or to find the reason for pain in the testicles.

What the risks are

There are no known risks. You will not be exposed to ionising radiation with this test. Ionising radiation procedures such as x-ray carry a small cancer risk and may damage sperm, but this test does not.

Special considerations

In certain cases, Doppler ultrasound may help identify blood flow inside the scrotum. For example, Doppler ultrasound is very helpful in cases of testicular torsion, because blood flow to the twisted testicle may be reduced.