Orchitis
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Orchitis is an infection of the testicle, which is rarely isolated, and when in conjunction with the epididymis is called epididymo-orchitis.
Pathology
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
Radiographic features
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.
Differential diagnosis
- ultrasound findings are very similar to a detorted testes; clinical differentiation is essential
- primary testicular malignancy should be considered, especially with focal changes
-<p><strong>Orchitis</strong> is an infection of the <a href="/articles/testes">testicle</a>, which is rarely isolated, and when in conjunction with the <a href="/articles/epididymis">epididymis</a> is called <a href="/articles/epididymitis">epididymo-orchitis</a>.</p><h4>Pathology</h4><p>Usually bacteria retrogradely seed into the testis from the <a href="/articles/urinary-bladder">bladder</a> or <a href="/articles/prostate">prostate</a>. Can also be secondary to viral infection (e.g. mumps, Coxsackie virus). </p><h5>Associations</h5><ul>- +<p><strong>Orchitis</strong> is an infection of the <a href="/articles/testes">testicle</a>, which is rarely isolated, and when in conjunction with the <a href="/articles/epididymis">epididymis</a> is called <a href="/articles/epididymitis">epididymo-orchitis</a>.</p><h4>Pathology</h4><p>Usually bacteria retrogradely seed into the testis from the <a href="/articles/urinary-bladder">bladder</a> or <a href="/articles/prostate">prostate</a>. Can also be secondary to viral infection (e.g. <a title="Mumps" href="/articles/mumps">mumps</a>, Coxsackie virus). </p><h5>Associations</h5><ul>