Diagnosis of Acute Testicular Torsion using Radionuclide Scanning

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Abstract
99mTc scrotal scan findings were analyzed in 37 patients with acute scrotal pain. Correlation between scan interpretation, and either surgical findings and/or final clinical diagnosis revealed an accuracy of 89%. Only 1 false negative and 3 false positive results were recorded. Scan data revealed a positive predictive value of 75%, negative predictive value of 96%, sensitivity of 90% and specificity of 89%. An inter-institutional observer study also was conducted to assess reliability of the scan, resulting in an 88% agreement. The testicular scan was found to be an accurate and reliable method to distinguish between epididymo-orchitis and testicular torsion.