Neural tube defects holoprosencephaly chiari malformation syringomyelia

What neurologic abnormality is characteristically seen in patients with syringomyelia?

1: Impaired bilateral discriminative touch, vibration sensation and proprioception
2: Impaired bilateral pain and temperature sense
3: Impaired pain and temperature sense in a unilateral distribution on the same side as the lesion
4: Impaired pain and temperature sense in a unilateral distribution opposite to the laterality of the lesion