Presentation
Admitted with sepsis.
Patient Data
Age: 75 years
Gender: Male
From the case:
Ankylosing spondylitis
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Info

Obscuration of the left hemidiaphragm silhouette. Unremarkable cardiomediastinal contour. "Bamboo spine" consistent with ankylosing spondylitis.
The patient's source of sepsis was diagnosed as an obstructive pyelonephritis.
From the case:
Ankylosing spondylitis
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Info

Preliminary shot from a nephrostogram demonstrates changes of ankylosing spondylitis with bamboo spine, dagger sign and sacroiliac joint ankylosis.
Case Discussion
Ankylosing spondylitis can often be an incidental finding, especially in older men.