NEW! We're excited to announce two new radiology learning pathways by Andrew Dixon and Frank Gaillard LEARN MORE

Ankylosing spondylitis with bamboo spine and dagger sign

Case contributed by Dr Mohammad Taghi Niknejad


Back pain and stiffness.

Patient Data

Age: 40 years
Gender: Male

There is typical appearance of bamboo spine with a single central radiodense line related to ossification of supraspinous and interspinous ligaments which is called dagger sign. Ankylosing is detectable in both sacroiliac joints.

Case Discussion

The findings of x-ray are consistent of ankylosing spondylitis.

PlayAdd to Share

Case information

rID: 21781
Published: 18th Feb 2013
Last edited: 3rd May 2020
Inclusion in quiz mode: Included

Updating… Please wait.

 Unable to process the form. Check for errors and try again.

 Thank you for updating your details.