FIG 4. Axial T2-weighted (3000/80/2 [TR/TE/NEX]) images in a 16-year-old patient who had inhaled thinner for 3 years.

A and B, Bilateral, symmetric hyperintensity is present in the parietal periventricular white matter (arrowheads). Note that gray matter-white matter differentiation is preserved. The widths of the cerebral sulci are normal. A suggests that the hyperintense findings may be caused by terminal myelination, which is a normal MR imaging finding in children. However, B shows that the lesions extend to the bilateral centrum semiovale, indicating that hyperintense findings were true lesions rather than terminal myelination.