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Utility of MRI in the identification of hippocampal sclerosis of aging
Author(s) -
Woodworth Davis C.,
Nguyen Hannah L.,
Khan Zainab,
Kawas Claudia H.,
Corrada María M.,
Sajjadi S. Ahmad
Publication year - 2021
Publication title -
alzheimer's and dementia
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 6.713
H-Index - 118
eISSN - 1552-5279
pISSN - 1552-5260
DOI - 10.1002/alz.12241
Subject(s) - subiculum , neuropathology , atrophy , hippocampal sclerosis , hippocampal formation , pathology , medicine , magnetic resonance imaging , hippocampus , multiple sclerosis , autopsy , biomarker , psychology , neuroscience , disease , biology , radiology , psychiatry , temporal lobe , epilepsy , dentate gyrus , biochemistry
Hippocampal sclerosis of aging (HS) is a common pathology often misdiagnosed as Alzheimer's disease. We tested the hypothesis that participants with HS would have a magnetic resonance imaging (MRI)‐detectable hippocampal pattern of atrophy distinct from participants without HS, both with and without Alzheimer's disease neuropathology (ADNP). Methods Query of the National Alzheimer's Coordinating Center database identified 198 participants with MRI and autopsy. Hippocampal subfields were segmented with FreeSurfer v6. Analysis of covariance for subfield volumes compared HS+ participants to those without HS, both with ADNP (HS–/ADNP+) and without (HS–/ADNP–). Results HS+ participants (N = 27, 14%) showed atrophied cornu ammonis 1 (CA1; left P < .001, η p 2 = 0.14; right P = .001, η p 2 = 0.09) and subiculum (left P < .001, η p 2 = 0.139; right P = .001, η p 2 = 0.085) compared to HS–/ADNP+ (N = 100, 51%). Compared to HS–/ADNP– (N = 71, 36%), HS+ also had atrophy in subiculum (left P < .001, η p 2 = 0.235; right P = .002, η p 2 = 0.137) and CA1 (left P < .001, η p 2 = 0.137; right P = .006, η p 2 = 0.070). Discussion Subiculum and CA1 atrophy from clinical MRI may be a promising in vivo biomarker for HS.