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Cauda equina syndrome — RCPSC EM MCQ

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ModerateNeurological emergenciesCauda equina syndromeRCPSC EM

A 52-year-old has acute low back pain after lifting, urinary retention, bilateral sciatica, and saddle anaesthesia. Lower limb strength is mildly reduced and rectal tone is decreased. What is the most appropriate investigation?

Educational content. Not a substitute for clinical judgement or local policy.

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Correct answer: C — Urgent MRI of the lumbosacral spine

Urgent MRI of the lumbosacral spine is correct: the clues indicate Cauda equina syndrome and this option addresses the immediate ED priority. The distractors delay care, target a less likely problem, or are unsafe in this physiology.

Reference: Canadian spinal emergency practice