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Erschienen in:
30.08.2018 | Classics in Abdominal Radiology
The “two-tone” testis
Erschienen in: Abdominal Radiology | Ausgabe 2/2019
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The term “two-tone” has been applied to the distinctive appearance of an uncommon artifact encountered at testicular ultrasonography, which is reminiscent of a custom paint job on a classic car (Fig. 1). First described in 1995 [1], the two-tone testis is an imaging artifact that characteristically exhibits normal parenchymal echogenicity in the near-field portion of a testicular ultrasound image with hypoechoic parenchymal echogenicity deep to an oblique interface. On color Doppler ultrasound imaging, the oblique interface is shown to be due to a transtesticular artery (Fig. 2).
Fig. 1
A customized 1954 Chevrolet 3100 pickup truck with a two-tone paint job. Photo courtesy of Pixabay.com, accessed June 2018
Fig. 2
The “two-tone” testis as seen on sagittal grayscale (A) and color Doppler (B) ultrasound imaging. Images demonstrate the differential echogenicity of the testicular substance in the near field and deep to a traversing intratesticular artery. The superficial testicular echogenicity is normal, whereas the echogenicity deep to the artery is decreased due to refractive shadowing. An incidental epididymal cyst is also imaged
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