**Core Concept**
Conus syndrome refers to a type of spinal cord injury affecting the conus medullaris, which is the lowest part of the spinal cord. This condition leads to a range of neurological deficits due to the damage to the nerve fibers within this region.

**Why the Correct Answer is Right**
Conus syndrome typically presents with sacral and lumbar nerve root dysfunction, resulting in symptoms such as urinary retention, bowel incontinence, and sexual dysfunction. This is due to the damage to the sacral nerve roots (S2-S5) that are responsible for controlling the pelvic organs. The conus medullaris is also responsible for transmitting pain and temperature sensation from the lower extremities.

**Why Each Wrong Option is Incorrect**
**Option A:** Incorrect because Conus syndrome is indeed associated with autonomic dysfunction, leading to symptoms such as orthostatic hypotension and temperature regulation abnormalities.
**Option B:** Incorrect because Conus syndrome often presents with bilateral lower extremity weakness, not unilateral weakness.
**Option C:** Incorrect because Conus syndrome can indeed cause sexual dysfunction, including erectile dysfunction and loss of libido.

**Clinical Pearl / High-Yield Fact**
It's essential to remember that Conus syndrome often presents with a "cape-like" distribution of sensory loss, which involves the perineal area and the medial aspects of the thighs. This distinctive sensory loss pattern is a key clinical feature of this condition.

**Correct Answer: B. Bilateral lower extremity weakness is not a typical presentation of Conus syndrome.**