Cauda Equina Syndrome — Management Pathway

Step-by-step decision

Choose step by step as prompted; reaching an endpoint gives the management recommendation. You can go back a step or restart anytime.

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Full pathway

1. [Decision] Red flags present?
   Are cauda equina red flags present? (Red flags: saddle anesthesia (perineal/perianal S3–S5), bladder dysfunction (urinary retention most common, with overflow incontinence / reduced sensation of voiding), bowel dysfunction (incontinence or loss of anal tone/sensation), bilateral leg pain/weakness/sciatica, sexual dysfunction; often with severe back pain. Causes: lumbar disc herniation (most common), spinal stenosis, tumor, epidural abscess/hematoma, trauma.)
   • Red flags present (retention/saddle anesthesia/bilateral leg signs) → Red flags → emergency MRI + decompression
   • Back pain only, no red flags → No red flags
2. [End] No red flags
   Back pain / unilateral sciatica only, no red flags: manage as mechanical back pain; clearly counsel on red flags (saddle anesthesia, bladder/bowel dysfunction, bilateral leg weakness) and to attend the ED immediately if they appear.
3. [End] Red flags → emergency MRI + decompression
   Neurosurgical emergency: 1) emergency lumbosacral MRI (first choice; CT myelogram if contraindicated) to define the level and cause. 2) Post-void residual/bladder scan and digital rectal exam (tone/sensation) to assess (incomplete CES-I vs CES-R with retention). 3) Urgent spine-surgery consult and early surgical decompression — aim within 48 h of symptom onset (earlier gives better bladder/bowel/motor recovery; later may still improve but with worse prognosis). 4) Treat the cause: antibiotics for abscess, steroids ± oncology for tumor. Do not adopt a wait-and-see approach.

Source guidelines & references

• Cauda equina syndrome (AANS); spine-surgery red flags and emergency decompression timing consensus

This pathway is our own synthesis of the decision logic in the guidelines above (not the guideline verbatim); thresholds and workflows change as guidelines update — in practice follow the latest guideline, your institution's protocol and the individual patient.

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