Orchitis

Orchitis is an infection of the testicle, which is rarely isolated, and when in conjunction with the epididymis is called epididymo-orchitis.

Usually, bacteria retrogradely seed into the testis from the bladder or prostate. Can also be secondary to viral infection (e.g. mumps, Coxsackie virus). 

  • almost all cases are associated with epididymitis
  • isolated orchitis can be seen in mumps and syphilis

Ultrasound is the gold standard investigation. When compared with the other testis in the 'sunglasses view' features of orchitis include relative: 

  • hypoechogenicity: focal or diffuse
  • hypervascularity: focal or diffuse
  • swelling
  • scrotal wall thickening

A complex/septated hydrocele can be seen in the ipsilateral scrotum

  • ultrasound findings are very similar to a detorted testes; clinical differentiation is essential 
  • primary testicular malignancy should be considered, especially with focal changes
Ultrasound - testicular and scrotal
Share article

Article information

rID: 21524
System: Urogenital
Tag: cases
Synonyms or Alternate Spellings:

Support Radiopaedia and see fewer ads

Cases and figures

  • Case 1
    Drag here to reorder.
  • Enlarged right te...
    Case 2: with a pyocele
    Drag here to reorder.
  • Case 3
    Drag here to reorder.
  • Updating… Please wait.

     Unable to process the form. Check for errors and try again.

     Thank you for updating your details.