A 33-year-old woman presents with progressive burning injuries to both hands sustained while cooking that she did not notice. Vital signs show BP 118/76, HR 82, RR 16, Temp 37.2°C, SpO2 98% on room air. Neurologic examination reveals bilateral loss of pain and temperature sensation over the shoulders and upper extremities with preserved vibration sense and normal strength. Brain MRI shows central cord signal abnormality. She denies recent trauma or fever. Which of the following is the most likely explanation?

1. A)Selective damage to lateral corticospinal tracts
2. B)Cavitation of the central spinal cord affecting crossing spinothalamic fibersGABARITO
3. C)Hemisection of the spinal cord
4. D)Destruction of anterior horn cells only
5. E)Compression of dorsal columns in the cervical cord