Genitourinary Radiology > Male Pelvis > Testis > Orchitis



Orchitis is a parenchymal infection of the testicle, often seen as a complication of mumps infection (25% of post-pubertal male patients with mumps). Other frequent causes include echovirus, group B arboviruses, and lymphocytic choriomeningitis virus. It is unilateral in 2/3, usually developing within 7-10 days of parotiditis associated with mumps. The testicle may be secondarily involved by epididymitis.

Gray scale image of both testicles (1), also known as the Dolly Parton view, and color flow images in asymptomatic testicle (2) and symptomatic testicle (3) shows enlarged left testicle compared with right. Also, color flow is remarkably increased in symptomatic testicle consistent with hyperemia in an inflammed testicle with orchitis. There was also epididymitis.

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