Manta ray sign (bladder)

Last revised by Ian Bickle on 9 Mar 2020

Citation, DOI, disclosures and article data

Citation:

Dixon A, Bickle I, El-Feky M, et al. Manta ray sign (bladder). Reference article, Radiopaedia.org (Accessed on 09 Dec 2023) https://doi.org/10.53347/rID-30152

DOI:

https://doi.org/10.53347/rID-30152

Permalink:

https://radiopaedia.org/articles/30152

rID:

30152

Article created:

22 Jul 2014, Andrew Dixon ◉

Disclosures:

At the time the article was created Andrew Dixon had no recorded disclosures.

View Andrew Dixon's current disclosures

Last revised:

9 Mar 2020, Ian Bickle ◉

Disclosures:

At the time the article was last revised Ian Bickle had no recorded disclosures.

View Ian Bickle's current disclosures

Revisions:

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

Systems:

Musculoskeletal, Urogenital

Sections:

Signs

Tags:

cases, refs

Synonyms:

Manta ray appearance

The manta ray sign is a radiographic appearance in bladder exstrophy. It describes wide midline separation of the pubic bones simulating the appearance of a manta ray swimming towards you ¹. The sacrum and iliac wings recall the manta ray’s head and body, with the widely spaced pubic rami forming its cephalic flaps .

Differential diagnosis

On a plain radiograph consider:

open book pelvic injuries: the smooth arc of the pelvis outline in bladder exstrophy differentiates it from acquired separation of the pubic symphysis seen in open book pelvic injuries