Guidelines for cauda equina syndrome. Red flags and white flags. Systematic review and implications for triage

Area of Science:

• Neurology
• Neurosurgery
• Emergency Medicine

Background:

• Patients with cauda equina syndrome (CES) are often referred late, after irreversible neurological damage has occurred.
• Current national guidelines for CES referral, imaging, and treatment frequently include symptoms indicative of late-stage, irreversible conditions.
• Late referral significantly limits treatment effectiveness and the potential for patient recovery.

Purpose of the Study:

• To critically evaluate the "red flag" symptoms and signs for cauda equina syndrome (CES) outlined in current national guidelines.
• To determine if existing guidelines adequately identify early-stage CES for timely intervention.
• To propose revisions to guidelines to improve early detection and referral for CES.

Main Methods:

• A review of seven relevant sources was conducted.
• Advice regarding emergency referral, imaging, and treatment for CES was analyzed.
• Symptoms and signs were compared against a standard classification of CES.

Main Results:

• Of 37 recommendations, 12 (32%) indicated early bilateral radiculopathy with favorable treatment outcomes.
• Thirteen recommendations (35%) were ambiguously described, potentially indicating either early or late CES.
• Twelve sets of symptoms/signs (32%) represented late-stage, irreversible CES with expected unfavorable outcomes.

Conclusions:

• A significant portion (up to two-thirds) of "red flag" symptoms/signs in current CES guidelines actually represent late-stage, irreversible disease ("white flags").
• Only 32% of identified symptoms/signs truly indicate early CES and warn of avoidable further damage.
• Guidelines require revision to emphasize early CES detection and referral, rather than focusing on severe, often untreatable, late-stage presentations.