Trauma & Torsion of the testis

Following injury, the testis may be enlarged or remain normal in size. Where there is excess fluid in the scrotum, the testis should be scanned at many different angles to exclude rupture. The injured testis may show complex echogenicity, especially when there is an internal hematoma (or subsequent abscess). Blood will appear as the fluid within the scrotum, often with complex echogenicity due to blood clots.

Torsion of the testis

It may be difficult to confirm the torsion of the testis with ultrasound, but if the rotation has disrupted the normal blood supply, ultrasound will demonstrate decreased echogenicity, compared with the normal testis,  in the acute stage. There may be associated with scrotal fluid (hydrocele).

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