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1. Sonography of the normal testis and epididymis

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Figure 54-1

Sonography of the normal testis and epididymis.

A. A longitudinal image of a 15-year-old boy a normal homogeneous echo pattern. B. Note the echogenic mediastinum testis (arrow) in this testis of a 12-year-old. C. The normal epididymis (arrows) often has a comet shape on longitudinal images.

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2. Testicular vessels

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Figure 54-2

Testicular vessels.

Longitudinal color Doppler image shows normal intratesticular arteries as linear areas of flow radiating from the mediastinum testis.

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3. Normal testicular Doppler

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Figure 54-3

Normal testicular Doppler.

Imaging of the normal testes of a teenager demonstrates the typical low-impedence arterial waveform. The resistive index is 0.58.

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4. Cryptorchidism; intraabdominal retention

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Figure 54-4

Cryptorchidism; intraabdominal retention.

The right testis (calipers) of this 23-day-old infant is just deep to the internal inguinal ring. The testis has normal echogenicity and has an oval shape.

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5. Cryptorchidism; inguinal retention

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Figure 54-5

Cryptorchidism; inguinal retention.

A. Sonography of a 9-month-old boy shows the left testis (arrows) in the inguinal canal. The testis has an oval shape on this longitudinal image. It is hypoechoic relative to adjacent subcutaneous fat. B. The mediastinum testis (arrow) is visible on a transverse image.

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6. Inguinal lymph node

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Figure 54-6

Inguinal lymph node.

Color Doppler sonography of a 6-month-old with cryptorchidism shows flow in a branching hilar artery (arrow) in an inguinal lymph node.

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7. Cryptorchidism

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Figure 54-7

Cryptorchidism.

A. A coronal Fluid-attenuated inversion recover (FLAIR) MR image of a 2-year-old with nonpalpable testes shows bilateral inguinal retention. The testes (arrows) are hyperintense to adjacent inguinal lymph nodes on this sequence. Each epididymis is a slightly lower signal intensity structure draped around the superior and lateral testicular margins. There are normal inguinal lymph nodes lateral to the testes. B. The mediastinum testis appears as a hypointense cleft (arrows) along the lateral aspect of each testis on this fat-suppressed T2-weighted image.

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8. Cryptorchidism

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Figure 54-8

Cryptorchidism.

An unenhanced coronal CT image of a 9-year-old boy shows bilateral inguinal retention. A gubernaculum (arrows) is visible extending caudal ...

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