What is the role of lab tests in the diagnosis of orchitis?

Updated: Aug 16, 2017
  • Author: Nataisia Terry, MD; Chief Editor: Erik D Schraga, MD  more...
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Answer

Laboratory tests are often not helpful in making the diagnosis of orchitis in the ED. Diagnosing mumps orchitis can be comfortably made based on history and physical examination alone. Diagnosing mumps orchitis can be confirmed with serum immunofluorescence antibody testing.

In sexually active males, urethral cultures and gram stain should be obtained for Chlamydia trachomatis and N gonorrhoeae. Urinalysis and urine culture should also be obtained.

Obtaining a C-reactive protein (CRP) or erythrocyte sedimentation rate (ESR) may also be helpful, because elevations of these are more suggestive of inflammation associated with epididymo-orchitis. [21, 22]


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