Computed tomography and pure motor hemiparesis.

Area of Science:

• Neurology
• Radiology

Background:

• Pure motor hemiparesis (PMH) is a neurological condition affecting motor function.
• The diagnostic utility of computed tomography (CT) in evaluating PMH requires further elucidation.

Purpose of the Study:

• To assess the findings of CT scans in patients diagnosed with pure motor hemiparesis.
• To correlate CT findings with patient outcomes and recovery rates.

Main Methods:

• Retrospective analysis of 33 patients with pure motor hemiparesis.
• Review of CT scan results, including lesion detection, location, and characteristics (infarction vs. hemorrhage).
• Correlation of CT findings with electroencephalogram (EEG), isotope scan, cerebrospinal fluid results, and clinical recovery.

Main Results:

• CT scans were abnormal in 75% (25/33) of patients with PMH.
• Capsular lesions were identified in 13 patients, with 10 consistent with infarction and 3 with hemorrhage.
• Eleven of 20 patients with normal EEG, isotope scan, and cerebrospinal fluid showed CT evidence of lesions in the internal capsule-corona radiata region.
• Patients with normal CT scans demonstrated more complete and rapid recovery compared to those with CT-evident vascular lesions.
• Five patients had CT-detected capsular lesions without prior neurological deficits.

Conclusions:

• CT is a valuable tool for identifying lesions in patients with pure motor hemiparesis, particularly in the capsular region.
• The presence and nature of CT-detected lesions correlate with patient recovery.
• CT may reveal asymptomatic lesions in the capsular region.