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Biomedical subjects

S Perot

Publications and source records attributed to S Perot.

5 recordsLinked to original sources
PubMed1993

Pure motor hemiparesis in a case of vertebrobasilar arterial ectasia.

A case of pure motor hemiparesis due to a pontine lacunar infarct is reported. Infarction was related to vertebrobasilar ectasia identified on CT, MRI and MR angiography. MR studies provide accurate information on anatomical location, residual lumen, partial thrombosis, mass effect on brain stem and CSF pathways and vascular complications.

Aged↗
PubMed1990

[Gadolinium-DTPA in the study of intracranial tumors in the adult].

Thirty intracranial tumours were explored by MRI, using T1- and T2-weighted sequences, before and after intravenous injection of Gd-DTPA. Two-thirds of the intra-axial tumours were accurately detected on one section plane by MRI without Gd-DTPA, but in one quarter of the cases Gd-DTPA only delineated precisely the tumour. On the other hand, Gd-DTPA failed to detect certain tumours (benign gliomas) or showed only a small part of them (mixed grade gliomas), while they were detected by MRI without contrast injection. However, in such cases Gd-DTPA was useful for the stereotaxic biopsy of the tumour. Gd-DTPA appears of lesser interest in extra-axial tumours. Gd-DTPA is thus valuable for the neuroradiological diagnosis of brain tumours, particularly to evaluate the grade of gliomas and to confirm the diagnosis of recurrent growths.

Adult↗
PubMed1989

Capsular ataxic hemiparesis. Early diagnosis with MRI.

The Authors report a case of ataxic hemiparesis caused by a lacunar infarct involving the posterior limb of the right internal capsule, in a 64-year-old hypertensive man who completely recovered in about two weeks. The lesion was detected by MRI four days after the onset of illness, when the CT scan was normal. In patients presenting with ataxic hemiparesis, MRI is the most accurate tool in locating very small causative infarcts of the brainstem or the subcortical white matter.

Ataxia↗