Fig. 7

Subacute combined degeneration in a 21-year-old male with a progressive history of sensory deficit and gait disturbance for 2 months who subsequently showed low serum vitamin B12 levels. Sagittal T2W image (A) demonstrates a long segment hyperintense signal within the posterior aspect of the cervical cord extending from C3 to C6 (bracket). Axial T2W image (B) shows hyperintensity involving the dorsal columns with the typical inverted V pattern (arrow)