Orchitis

Dr Matt A. Morgan and Dr Ian Bickle et al.

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). 

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

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 hydrocoele 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
Share article

Article information

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

Support Radiopaedia and see fewer ads

Cases and figures

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

    Alert accept

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

    Alert accept Thank you for updating your details.