Keyhole sign (posterior urethral valves)

Last revised by Ashesh Ishwarlal Ranchod ◉ on 25 Sep 2023

Citation, DOI, disclosures and article data

Citation:

Radswiki T, Ranchod A, Baba Y, et al. Keyhole sign (posterior urethral valves). Reference article, Radiopaedia.org (Accessed on 29 Sep 2023) https://doi.org/10.53347/rID-12802

DOI:

https://doi.org/10.53347/rID-12802

Permalink:

https://radiopaedia.org/articles/12802?iframe=true

rID:

12802

Article created:

12 Jan 2011, The Radswiki ◉

Disclosures:

At the time the article was created The Radswiki had no recorded disclosures.

View The Radswiki's current disclosures

Last revised:

25 Sep 2023, Ashesh Ishwarlal Ranchod ◉

Disclosures:

At the time the article was last revised Ashesh Ishwarlal Ranchod had no financial relationships to ineligible companies to disclose.

View Ashesh Ishwarlal Ranchod's current disclosures

Revisions:

14 times, by 10 contributors - see full revision history and disclosures

Systems:

Urogenital, Paediatrics

Sections:

Signs

Tags:

bladder, urethra, ultrasound, refs, cases

Synonyms:

Keyhole signs (posterior urethral valves)
Key hole sign (posterior urethral valves)

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.