Drop sign

Last revised by Joachim Feger on 14 Nov 2021

Citation, DOI, disclosures and article data

Citation:

Feger J, Bell D, Knipe H, Drop sign. Reference article, Radiopaedia.org (Accessed on 25 Apr 2024) https://doi.org/10.53347/rID-77404

DOI:

https://doi.org/10.53347/rID-77404

Permalink:

https://radiopaedia.org/articles/77404?iframe=true

rID:

77404

Article created:

13 May 2020, Joachim Feger ◉

Disclosures:

At the time the article was created Joachim Feger had no recorded disclosures.

Last revised:

14 Nov 2021, Joachim Feger ◉

Disclosures:

At the time the article was last revised Joachim Feger had no recorded disclosures.

Revisions:

7 times, by 3 contributors - see full revision history and disclosures

Systems:

Musculoskeletal

Tags:

elbow, drop sign, elbow instability, cases3

Synonyms:

The drop sign is referred to as an increased ulnohumeral distance (≥4 mm) on a lateral radiograph of the elbow after reduction of elbow dislocation and indicates instability ^1-4.

The drop sign was first described in 2005 by Ralph W Coonrad (fl. 2020), an orthopedic surgeon at Duke University in North Carolina, USA ¹.