Complications of the Rigid Spine.

Area of Science:

• Orthopedics
• Radiology
• Rheumatology

Background:

• Rigid spine conditions, including spondylarthritis and diffuse idiopathic skeletal hyperostosis, present unique diagnostic challenges.
• Ossification of the posterior longitudinal ligament is a less common but significant cause of spinal rigidity.

Purpose of the Study:

• To review common causes and imaging findings of rigid spine.
• To detail the pathogenesis and imaging characteristics of acute fractures in rigid spines.
• To emphasize the diagnostic limitations of conventional radiography for these fractures.

Main Methods:

• Review of literature on rigid spine etiologies and fracture complications.
• Analysis of imaging findings associated with spondylarthritis, DISH, and OPLL.
• Discussion of fracture detection challenges and diagnostic recommendations.

Main Results:

• Fractures in rigid spines are often subtle, difficult to detect on initial radiographs, and can occur after minor trauma.
• These fractures are frequently unstable, carrying a high risk of neurological injury, morbidity, and mortality.
• Conventional radiography has a low negative predictive value for detecting these fractures.

Conclusions:

• Patients with rigid spines experiencing new pain require prompt cross-sectional imaging (e.g., CT or MRI) due to the high risk of missed fractures.
• Early and accurate diagnosis of fractures in rigid spines is critical for timely management and mitigating severe outcomes.