Estimating cerebral microinfarct burden from autopsy samples.

Abstract:

OBJECTIVE:To estimate whole-brain microinfarct burden from microinfarct counts in routine postmortem examination. METHODS:We developed a simple mathematical method to estimate the total number of cerebral microinfarcts from counts obtained in the small amount of tissue routinely examined in brain autopsies. We derived estimates of total microinfarct burden from autopsy brain specimens from 648 older participants in 2 community-based clinical-pathologic cohort studies of aging and dementia. RESULTS:Our results indicate that observing 1 or 2 microinfarcts in 9 routine neuropathologic specimens implies a maximum-likelihood estimate of 552 or 1,104 microinfarcts throughout the brain. Similar estimates were obtained when validating in larger sampled brain volumes. CONCLUSIONS:The substantial whole-brain burden of cerebral microinfarcts suggested by even a few microinfarcts on routine pathologic sampling suggests a potential mechanism by which these lesions could cause neurologic dysfunction in individuals with small-vessel disease. The estimation framework developed here may generalize to clinicopathologic correlations of other imaging-negative micropathologies.

journal_name

Neurology

journal_title

Neurology

authors

Westover MB,Bianchi MT,Yang C,Schneider JA,Greenberg SM

doi

10.1212/WNL.0b013e31828c2f52

subject

Has Abstract

pub_date

2013-04-09 00:00:00

pages

1365-9

issue

15

eissn

0028-3878

issn

1526-632X

pii

WNL.0b013e31828c2f52

journal_volume

80

pub_type

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