Dagger sign

Dagger sign is a radiologic sign seen in advanced cases of ankylosing spondylitis.^[1] The appearance of a dagger is seen in the X-ray because of ossification of the supraspinous and infraspinous ligaments.^[2] As a result, a central dense line of sclerosis, resembling a dagger can be seen in the AP radiograph of spine and pelvis.^[3]

References

[edit]

^ Jurik, Anne Grethe (8 January 2011). "Imaging the spine in arthritis—a pictorial review". Insights into Imaging. 2 (2): 177–191. doi:10.1007/s13244-010-0061-4. ISSN 1869-4101. PMC 3259357. PMID 22347946.
^ Kumar, Rajiv Ranjan; Jha, Saket; Sharma, Aman (31 December 2019). "Dagger sign of ankylosing spondylitis". Oxford Medical Case Reports. 2019 (12): 502–503. doi:10.1093/omcr/omz117. ISSN 2053-8855. PMC 6937459. PMID 31908821. Retrieved 1 November 2021.
^ "Ankylosing spondylitis - dagger sign". Radiology at St. Vincent's University Hospital. Retrieved 1 November 2021.

v t e Radiologic signs
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Musculoskeletal	Absent bowtie sign Anteater nose sign Blade of grass sign Brim sign Celery stalking Cheerio sign Cockade sign Codfish vertebra Corduroy sign Crescent sign Dagger sign Deep lateral femoral notch sign Double posterior cruciate ligament sign Dripping candle wax sign Empty vertebral body sign Fabella sign Fairbank's changes Fat pad sign/Sail sign of the elbow Gilula's lines Growth arrest lines Hilgenreiner's line Honda sign J-shaped sella sign Klein's line Licked candy stick appearance Light bulb sign Napoleon hat sign Notching of the ribs Osteopathia striata Pencil-in-cup sign Perkin's line Polka dot sign Popcorn calcification Sandwich vertebra Scottie dog sign Shiny corner sign Terry-Thomas sign Thurstan Holland sign Trethowan's sign
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Urogenital	Bear paw sign Canga's bead symptom Drooping lily sign Faceless kidney sign Fishhook ureter sign Jackstone calculus Maiden waist deformity Putty kidney
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Dagger sign

Dagger sign

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Dagger sign

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