Collar sign in diaphragmatic rupture
Citation, DOI, disclosures and article data
Citation:
Niknejad M, Elfeky M, Weerakkody Y, et al. Collar sign in diaphragmatic rupture. Reference article, Radiopaedia.org (Accessed on 22 Mar 2025) https://doi.org/10.53347/rID-21689
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rID:
21689
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Disclosures:
At the time the article was created Mohammad Taghi Niknejad had no recorded disclosures.
View Mohammad Taghi Niknejad's current disclosures
Last revised:
Disclosures:
At the time the article was last revised Mostafa Elfeky had no recorded disclosures.
View Mostafa Elfeky's current disclosures
Revisions:
11 times, by
8 contributors -
see full revision history and disclosures
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Synonyms:
- Hour glass sign
- Collar sign (diaphragmatic rupture)
- Hourglass sign
- Hour glass sign (diaphragmatic rupture)
The collar sign, also called the hourglass sign, is a helpful sign for diagnosis of diaphragmatic rupture on coronal or sagittal CT/ MR images and barium studies. It refers to a waist-like or collar-like appearance of herniated organs at the level of the diaphragm.
Small tear on the right side can appear as a subtle focal indentation of the liver on axial images and can be overlooked. This sign requires careful examination of multiplanar reformatted images 5.
See also
Quiz questions
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References
- 1. Killeen KL, Mirvis SE, Shanmuganathan K. Helical CT of diaphragmatic rupture caused by blunt trauma. AJR Am J Roentgenol. 1999;173 (6): 1611-6. AJR Am J Roentgenol (abstract) - Pubmed citation
- 2. Oikonomou A, Prassopoulos P. CT imaging of blunt chest trauma. Insights Imaging. 2011;2 (3): 281-295. doi:10.1007/s13244-011-0072-9 - Free text at pubmed - Pubmed citation
- 3. Brant WE, Helms CA. Fundamentals of diagnostic radiology. Lippincott Williams & Wilkins. (2007) ISBN:0781765188. Read it at Google Books - Find it at Amazon
- 4. Kaur R, Prabhakar A, Kochhar S et-al. Blunt traumatic diaphragmatic hernia: Pictorial review of CT signs. (2015) The Indian journal of radiology & imaging. 25 (3): 226-32. doi:10.4103/0971-3026.161433 - Pubmed
- 5. Sandrine Iochum, Thomas Ludig, Frédéric Walter et-al. Imaging of Diaphragmatic Injury: A Diagnostic Challenge?1. (2002) RadioGraphics. doi:10.1148/radiographics.22.suppl_1.g02oc14s103#REF18
Incoming Links
Articles:
Cases:
- Subphrenic abscess with diaphragmatic fistula
- Collar sign of diaphragmatic rupture
- Traumatic diaphragmatic rupture
- Diaphragmatic rupture
- Multitrauma with diaphragmatic rupture
- Multitrauma with diaphragmatic rupture and pelvic fractures
- Diaphragmatic rupture
- Ruptured left hemidiaphragm
- Diaphragmatic rupture
- Left diaphragmatic laceration with hourglass stomach
Multiple choice questions:
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