Post-ictal Todd paralysis
Left hemiparesis and neglect. Followed by 10 minute seizure.
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No acute intracranial haemorrhage identified. Focal hypodensities in the left lentiform nuclear and left corona radiata likely represent chronic lacunar infarcts. Grey-white differentiation is otherwise preserved. No mass lesion. Ventricular size, sulcal pattern and basal cisterns are all unchanged. No bony abnormality demonstrated.
Increased CBV/CBF and reduced TMax/MTT in the right temporal and right parietal lobes in keeping with hyperperfusion.
Basilar fenestration. No aneurysms or large vessel filling defect identified. Asymmetric calibre of the M3/M4 branches in the right temporoparietal region.
The CT perfusion demonstrates hyperperfusion localised to the right temporal and parietal lobes, which correspond with the patient's symptoms. It was presumed that the first seizure was not witnessed with only the left hemiparesis evident.
The main differential diagnosis is that of luxury perfusion in subacute ischaemic infarct, however, there are no changes of established infarct on the non-contrast CT brain, no large vessel thrombus on the CTA and CT perfusion in luxury perfusion shows prolonged MTT/Tmax. Also, a follow-up MRI (not shown) did not demonstrate any evidence of infarct.
- Payabvash S, Oswood MC, Truwit CL, McKinney AM. Acute CT perfusion changes in seizure patients presenting to the emergency department with stroke-like symptoms: correlation with clinical and electroencephalography findings. Clinical radiology. 70 (10): 1136-43. doi:10.1016/j.crad.2015.06.078 - Pubmed