18F-fluorodeoxyglucose-PET for patients with suspected spondylitis showing Modic change

Area of Science:

• Medical imaging
• Nuclear medicine
• Spinal diagnostics

Background:

• Differentiating vertebral bone marrow infection (Modic type 1 signal) from common Modic change on MRI can be challenging.
• Pyogenic spondylitis diagnosis requires distinguishing infection from non-infectious Modic changes.

Purpose of the Study:

• To evaluate the diagnostic utility of 18F-fluorodeoxyglucose-positron emission tomography (FDG-PET) for pyogenic spondylitis in patients presenting with Modic change.
• To assess FDG-PET's ability to differentiate spinal infection from other Modic changes.

Main Methods:

• Prospective cohort study involving 312 patients with low back pain over a 1-year follow-up.
• 18 patients with suspected pyogenic vertebral osteomyelitis underwent evaluation including FDG-PET, alongside clinical, laboratory, and other imaging data.
• FDG-PET findings were compared between radiologists (group 2) and observers without access to FDG-PET (group 1).

Main Results:

• FDG-PET demonstrated isotope accumulation in the lumbar spine of 11 patients, consistent with infection.
• Diagnostic outcomes by observers using FDG-PET (group 2) were comparable to those without FDG-PET information (group 1).
• The study indicated a high detection rate for spondylodiscitis when FDG-PET was incorporated into the diagnostic process.

Conclusions:

• 18F-FDG-PET is a valuable tool for diagnosing pyogenic spondylitis in patients with Modic change.
• FDG-PET significantly aids in distinguishing spinal infections from common Modic changes.
• The integration of FDG-PET enhances the accuracy of diagnosing spinal infections.