FIG 2. A–D, MR images of the lumbosacral spine in a patient with the congenital hypomyelinating form of DSD (case 8).

Marked diffuse enhancement of the cauda equina nerve roots in the absence of root enlargement is seen on pre- (A) and postcontrast (B) SE T1-weighted (500/15) sagittal images. Fat-suppressed (SPIR) coronal postcontrast T1-weighted image (C) enables better contrast between enhanced spinal ganglia (arrow) and surrounding fat-suppressed fat tissue signal compared with corresponding non-SPIR image (D).