Urinary retention is a potential sign of which spinal emergency?

Urinary retention is a potential sign of which spinal emergency?

• A. Saddle anesthesia
• B. Paresthesias in hands
• C. Hyperreflexia
• D. Urinary retention

Answer: (D)

Urinary retention points to involvement of the sacral nerve roots (S2–S4) that control the bladder. In cauda equina syndrome, compression or injury of these lower nerve roots disrupts detrusor muscle coordination and sphincter control, leading to an acute inability to void. This bladder dysfunction is a key red flag for this spinal emergency and requires urgent evaluation to prevent permanent deficits. While saddle anesthesia is also associated with cauda equina syndrome, the question highlights a sign tied directly to bladder function, making urinary retention the most specific indicator here. Paresthesias in the hands suggest a higher-level (cervical) issue, and hyperreflexia points to upper motor neuron involvement rather than sacral nerve root disruption.

Urinary retention points to involvement of the sacral nerve roots (S2–S4) that control the bladder. In cauda equina syndrome, compression or injury of these lower nerve roots disrupts detrusor muscle coordination and sphincter control, leading to an acute inability to void. This bladder dysfunction is a key red flag for this spinal emergency and requires urgent evaluation to prevent permanent deficits. While saddle anesthesia is also associated with cauda equina syndrome, the question highlights a sign tied directly to bladder function, making urinary retention the most specific indicator here. Paresthesias in the hands suggest a higher-level (cervical) issue, and hyperreflexia points to upper motor neuron involvement rather than sacral nerve root disruption.