Accuracy of ultrasound in diagnosis of rupture after blunt testicular trauma.

In 6 patients who underwent ultrasound scanning and operation after blunt testicular trauma, the scan suggested the correct diagnosis in only 2 patients. There was one false-positive and three false-negative diagnoses of rupture. Absence of firm diagnostic criteria for rupture and high error rates with various criteria now in use make reliance on ultrasound in the diagnosis of testicular rupture inappropriate at this time.