Dissoscited sensory loss is seen in
Synringomyelia
Viatmain B12 deficiency
Transverse myelitis
Pellagra
Refer Robbins page no 1258 Syringomyelia is a generic term referring to a disorder in which a cyst or cavity forms within the spinal cord. This cyst, called a syrinx, can expand and elongate over time, destroying the spinal cord. The damage may result in loss of feeling, paralysis, weakness, and stiffness in the back, shoulders, and extremities.
Nervous system