Diagnosing temporal arteritis: duplex vs. biopsy

Area of Science:

• Vascular Medicine
• Diagnostic Imaging
• Rheumatology

Background:

• Temporal artery biopsy is the standard for diagnosing temporal arteritis but has low sensitivity.
• Accurate diagnosis is crucial to prevent complications like blindness.

Purpose of the Study:

• To compare clinical decisions and patient outcomes following negative temporal artery biopsy versus negative temporal artery duplex.
• To evaluate the utility of duplex ultrasound as an alternative to biopsy in diagnosing temporal arteritis.

Main Methods:

• Retrospective analysis of 290 patients with suspected temporal arteritis.
• Comparison of outcomes between 147 patients with negative temporal artery duplex and 143 with negative temporal artery biopsy.
• Analysis included steroid discontinuation, alternative diagnoses, and incidence of blindness, stratified by pre-test probability.

Main Results:

• Steroid discontinuation rates were equivalent between the duplex and biopsy groups.
• No significant differences were observed in adverse outcomes (e.g., blindness) or the number of alternative diagnoses considered.
• These findings held true even when patients were stratified by their pre-test probability of having temporal arteritis.

Conclusions:

• Bilateral temporal artery duplex performs comparably to biopsy in clinical practice for diagnosing temporal arteritis.
• Temporal artery duplex offers a non-invasive alternative, avoiding surgical morbidity associated with biopsy.
• Biopsy may be reserved for cases where duplex results conflict with clinical presentation and could alter treatment.