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Figure 7. Clinically proved acute epididymo-orchitis in a 32-year-old man. Transverse US scan of testis shows acute epididymo-orchitis as focal areas of decreased echogenicity (arrowhead) in testicular parenchyma (T), resembling a metastatic lesion with reactive hydrocele (F). These hypoechoic areas were completely resolved at follow-up US after 2 weeks of antibiotic treatment.