Familiar Mediterranean fever mimicking septic arthritis: distinguishing with diffusion weighted imaging

Area of Science:

• Rheumatology
• Radiology
• Medical Diagnostics

Background:

• Familial Mediterranean fever (FMF) arthritis typically presents as monoarticular inflammation.
• Affected joints exhibit signs of acute inflammation, closely resembling septic arthritis.
• Conventional imaging modalities like MRI and ultrasound often fail to distinguish FMF arthritis from septic arthritis.

Observation:

• The case highlights the diagnostic challenge where FMF arthritis mimics septic arthritis.
• Standard imaging techniques were insufficient for definitive differentiation.
• Synovial fluid culture is currently the gold standard for diagnosis, leading to potential treatment delays.

Findings:

• Diffusion-weighted imaging (DWI) assesses water proton mobility, offering potential diagnostic value.
• This case presents MRI and DWI findings in FMF arthritis that mimicked septic arthritis.
• DWI may serve as a rapid, non-invasive tool to aid in differentiating these conditions.

Implications:

• Early and accurate diagnosis of FMF arthritis is crucial for timely and appropriate management.
• DWI could potentially reduce diagnostic delays and the need for invasive procedures.
• Integrating DWI into diagnostic algorithms may improve patient outcomes for suspected septic arthritis with underlying FMF.