Jellyfish sign (ultrasound)

Last revised by Chris Lim on 18 Jun 2020

Citation, DOI, disclosures and article data

Citation:

Carroll D, Lim C, El-Feky M, Jellyfish sign (ultrasound). Reference article, Radiopaedia.org (Accessed on 27 Mar 2023) https://doi.org/10.53347/rID-66858

DOI:

https://doi.org/10.53347/rID-66858

Permalink:

https://radiopaedia.org/articles/66858?iframe=true

rID:

66858

Article created:

9 Mar 2019, David Carroll ◉

Disclosures:

At the time the article was created David Carroll had no recorded disclosures.

View David Carroll's current disclosures

Last revised:

18 Jun 2020, Chris Lim

Disclosures:

At the time the article was last revised Chris Lim had no recorded disclosures.

View Chris Lim's current disclosures

Revisions:

2 times, by 2 contributors - see full revision history and disclosures

Systems:

Chest

Sections:

Signs

Tags:

pocus, lung

The jellyfish sign refers to the sonographic appearance of atelectatic lung "swimming" within a large pleural effusion. The mobility of the lung within pleural fluid implies an absence of lung consolidation and the absence of pleural adhesions ¹. It is also suggestive of a transudative pleural effusion, as the viscosity of more exudative effusions may hamper free lung excursion ².