Which two signs indicate cauda equina syndrome requiring urgent referral?

Which two signs indicate cauda equina syndrome requiring urgent referral?

• A. Saddle anesthesia
• B. New urinary retention or incontinence
• C. Both saddle anesthesia and new urinary retention or incontinence
• D. Dorsal foot numbness.

Answer: (C)

Cauda equina syndrome is a surgical emergency, and recognizing its red flags helps trigger urgent assessment. Saddle anesthesia signals loss of sensation in the perineal region supplied by sacral nerve roots (S2–S4), which are precisely the roots affected when the cauda equina is compressed. New urinary retention or incontinence shows that the autonomic and somatic nerves controlling the bladder are impaired. When these two signs appear together, it strongly indicates significant cauda equina involvement and the need for urgent referral for imaging and potential decompression to prevent lasting bladder, bowel, or sexual dysfunction. Dorsal foot numbness can occur with other nerve problems and doesn’t by itself point to cauda equina syndrome, so it’s not the same urgent warning as the two signs described.

Cauda equina syndrome is a surgical emergency, and recognizing its red flags helps trigger urgent assessment. Saddle anesthesia signals loss of sensation in the perineal region supplied by sacral nerve roots (S2–S4), which are precisely the roots affected when the cauda equina is compressed. New urinary retention or incontinence shows that the autonomic and somatic nerves controlling the bladder are impaired. When these two signs appear together, it strongly indicates significant cauda equina involvement and the need for urgent referral for imaging and potential decompression to prevent lasting bladder, bowel, or sexual dysfunction. Dorsal foot numbness can occur with other nerve problems and doesn’t by itself point to cauda equina syndrome, so it’s not the same urgent warning as the two signs described.