Unexpected FDG Uptake in the Cerebral Parenchyma in Subacute Subarachnoid Hemorrhage.

Changes in cerebral glucose metabolism after subarachnoid hemorrhage have been rarely described. We present a case with subacute subarachnoid hemorrhage showing unexpected elevated FDG uptake at adjacent cerebral parenchyma on FDG PET/CT. The density of the cerebral parenchyma was normal on CT. The patient received medical management without any neurological complication.