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Type:
Educational Exhibit
Keywords:
Neuroradiology brain, CT, MR, MR-Diffusion/Perfusion, Diagnostic procedure, Imaging sequences, Oedema, Ischaemia / Infarction, Haemorrhage
Authors:
J. Saad1, F. Marrakchi 2, F. Harbi1, S. Alghamdi1; 1Nejran/SA, 2Monastir/TN
DOI:
10.1594/ecr2015/C-1446
Background
Posterior reversible encephalopathy syndrome (PRES) a neuro- radiological syndrome characterized by seizures,
altered level of consciousness and visual disturbance. regardless of the underlying cause,
the main abnormality is cerebral vasogenic edema,
the pathogenesis of which is still under debate [1,
2].
PRES is typically reversible once the cause is removed.
However,
patients with severe manifestations of PRES,
such as coma and/or status epilepticus,
may require admission to the intensive care unit (ICU) [9,
10].
Moreover,
permanent neurological impairment or death occurs in a minority of patients [5,
7,
8].
PRES is well recognized because of its typical imaging appearance that is involvement of the parieto-occipital regions.
Other brain regions may also be affected and unusual imaging manifestations are observed frequently. Atypical imaging findings should not dissuade the diagnosis of PRES in the appropriate clinical situation,
and knowledge of the varied appearance and atypical findings of PRES allows the radiologist to make this diagnosis.