Cerebral hyperperfusion sometimes occurs after removal of chronic subdural hematoma
(CSH) and usually resolves within a few days without any symptoms. Subcortical low
intensity (SCLI) on fluid-attenuated inversion recovery (FLAIR) magnetic resonance
images is rare and has been reported in some diseases other than CSH. A case of organized
CSH who suffered prolonged neurologic deterioration, SCLI, and cerebral hyperperfusion
postoperatively is described.