K. Marder et al., CLINICAL CORRELATES OF ALZHEIMERS-DISEASE WITH AND WITHOUT SILENT RADIOGRAPHIC ABNORMALITIES, Archives of neurology, 52(2), 1995, pp. 146-151
Objective: To determine whether patients with Alzheimer's disease (AD)
who do not have historical or clinical evidence of stroke but who do
have computed tomographic or magnetic resonance imaging evidence of no
ncortical lesions smaller than 2 cm or periventricular ''caps'' differ
from other patients with AD. Methods: The computed tomographic or mag
netic resonance imaging scans of 158 patients meeting criteria of the
National Institute of Neurological Disorders and Stroke-Alzheimer's Di
sease and Related Disorders Association for probable AD were reviewed
by one neuroradiologist. Two measures of disease severity-the Modified
Mini-Mental State examination and the Blessed Dementia Rating Scale (
Part I)-were subjected to two-way analysis of variance with scan type
(computed tomography or magnetic resonance imaging) and lesion number
as between-group factors and age and disease duration as covariates. R
esults: No relationship was seen between lesion number or periventricu
lar caps and disease severity, Conclusion: In this cross-sectional ana
lysis using these clinical measures, patients with AD who have well-de
fined radiographic abnormalities cannot be differentiated from patient
s with AD who do not have them.