Keyhole sign (posterior urethral valves)

Keyhole sign
(posterior urethral valves) • Posterior urethral valve - antenatal ultrasound - Ganzer Fall bei Radiopaedia
Patel, M. Posterior urethral valve - antenatal ultrasound. Case study, Radiopaedia.org. (accessed on 02 Nov 2022) https://doi.org/10.53347/rID-39006 • CC by-nc-sa 3.0 (modified)
Keyhole sign
(posterior urethral valves) • Posterior urethral valve - antenatal ultrasound - Ganzer Fall bei Radiopaedia
Patel, M. Posterior urethral valve - antenatal ultrasound. Case study, Radiopaedia.org. (accessed on 02 Nov 2022) https://doi.org/10.53347/rID-53772 • CC by-nc-sa 3.0 (modified)
Keyhole sign
(posterior urethral valves) • Posterior urethral valves - antenatal - Ganzer Fall bei Radiopaedia
Haouimi, A. Posterior urethral valves - antenatal. Case study, Radiopaedia.org. (accessed on 02 Nov 2022) https://doi.org/10.53347/rID-151395 • CC by-nc-sa 3.0 (modified)
Radiopaedia • CC-by-nc-sa 3.0 • de

The keyhole sign is an ultrasonographic sign seen in boys with posterior urethral valves. It refers to the appearance of the proximal urethra (which is dilated) and an associated thick-walled distended bladder which on ultrasound may resemble a keyhole.

Siehe auch:
Assoziationen und Differentialdiagnosen zu Schlüssellochzeichen posteriore Urethralklappe:
Urethralklappe
 
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