Bilateral FLAIR hyperintense putamina are noted. The medial, lateral and posterior aspects of the putamina are delineated by the hyperintense oedematous external capsules. This imaging appearance constitutes the "lentiform fork sign"
A focal area of right posterior cortical hyperintensity is noted.
The globus pallidus appears engulfed by T2 hyperintensity which represents the oedematous medullary laminae, which divide the lentiform nucleus into three masses. T2 hyperintensity is seen extending down into the midbrain and the mesial temporal lobes. Corresponding hypointense changes in the internal and external capsules are seen.
No evidence of restricted diffusion is seen, however characteristically elevated ADC signal is seen involving the internal and external capsules.