Orchitis is inflammation of one or both testicles. Usually caused from bacteria or infection. The mumps virus used to be the most common cause of Orchitis until vaccinations have decreased it’s occurrence.

Sexually transmitted disease (usually in men 19-35) is one cause. Also infections that arise in the prostate or epididymis.

Risk Factors

There are a few risk factors for orchitis that are not related to STD’s (Sexually Transmitted Diseases).

  • Not receiving the mumps vaccine
  • Age >45 yrs.
  • Congenital Urinary Tract Abnormalities
  • Urinary Tract Infections (UTI’s)
  • Genito-urinary Surgery
  • Prolonged usage of a Foley Catheter
One thing that can help differentiate is that Epididymo-orchitis is generally bacterial in origin while isolated orchitis will usually have a viral origin.
  • Orchitis will usually show manifestations of testicular pain and acute edema. For this reason Ultrasound is used. Testicular torsion must be ruled out.
  • Ultrasonography is a highly sensitive method or ruling out torsion and/or inflammation of the teste and epididymis.


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I am the founder and lead Instructor here at ExamRefresh.com. I strive to help those that are entering the field of Ultrasound to be the best that they can be. Ultrasound is my passion.

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