Dagger sign (spine)
Last revised by Joachim Feger on 16 Aug 2024
Citation, DOI, disclosures and article data
Citation:
Gaillard F, Feger J, Niknejad M, et al. Dagger sign (spine). Reference article, Radiopaedia.org (Accessed on 06 Oct 2024) https://doi.org/10.53347/rID-1200
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rID:
1200
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Disclosures:
At the time the article was created Frank Gaillard had no recorded disclosures.
View Frank Gaillard's current disclosures
Last revised:
16 Aug 2024,
Joachim Feger ◉
Disclosures:
At the time the article was last revised Joachim Feger had no financial relationships to ineligible companies to disclose.
View Joachim Feger's current disclosures
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34 times, by
18 contributors -
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Synonyms:
- The dagger sign
The dagger sign is a radiographic feature seen in ankylosing spondylitis as a single central radiodense line on frontal radiographs running along the spinous processes 1.
Related pathology
The dagger sign is related to the ossification of the supraspinous and interspinous ligaments secondary to enthesitis 2. The radiodense line can extend into the sacrum 3. It is a late sign of ankylosing spondylitis and often appears alongside other classic signs, including bamboo spine.
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References
- 1. Maizlin Z, Kuruvilla M, Clement J, Vos P, Brown J. Radiologic Signs of Weapons and Munitions: How Will Noncombatants Recognize Them? AJR Am J Roentgenol. 2010;195(2):W96-104. doi:10.2214/AJR.09.4029 - Pubmed
- 2. Reinders A & Van Wyk M. Bamboo Spine – X-Ray Findings of Ankylosing Spondylitis Revisited. S Afr J Radiol. 2012;16(3):111-3. doi:10.4102/sajr.v16i3.294
- 3. Olivieri I, Ciancio G, Scarano E, Padula A. The Extension of the Ankylosing Spondylitis "Dagger Sign" into the Sacrum. J Rheumatol. 2000;27(12):2944-5. - Pubmed
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Articles:
Cases:
- Ankylosing spondylitis (pelvic x-ray)
- Ankylosing spondylitis
- Ankylosing spondylitis
- Ankylosing spondylitis
- Ankylosing spondylitis
- Ankylosing spondylitis
- Ankylosing spondylitis
- Ankylosing spondylitis
- Ankylosing spondylitis
- Ankylosing spondylitis with dagger sign
- Diffuse idiopathic skeletal hyperostosis
- Chalk stick fracture - ankylosing spondylitis
- Ankylosing spondylitis
- Ankylosing spondylitis
- Ankylosing spondylitis
- Ankylosing spondylitis
- Ankylosing spondylitis
- Chalkstick fracture in ankylosing spondylitis
- Small bowel obstruction and ankylosing spondylitis
- Dagger sign of ankylosing spondylitis
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