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      Medial Temporal Lobe Width on CT Scanning in Alzheimer’s Disease: Comparison with Vascular Dementia, Depression and Dementia with Lewy Bodies

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          Abstract

          A simple linear measurement of the minimum width of the medial temporal lobe (MTL) on angled CT scans has been suggested as an accurate ante-mortem marker for Alzheimer’s disease (AD). To determine the clinical utility and specificity of this finding, we performed angled CT scans with 5-mm slices in 116 subjects referred to a geographically based Old Age Psychiatry service in Newcastle. Diagnoses were of NINCDS/ADRDA AD (n = 69, 36 probable and 33 possible). NINDS/AIREN vascular dementia (VaD, n = 25), consensus criteria for dementia with Lewy bodies (DLB, n = 9) and DSM-IV criteria for major depression (n = 13). Subjects were well matched for age. Minimum MTL width was significantly greater in depressed subjects (13.7 mm) compared to those with dementia, though no differences were seen within the dementia groups (AD 10.8, VaD 10.4, and DLB 10.9 mm). An MTL width below 11.5 mm had a sensitivity of 54% (56/103) and a specificity of 77% (10/13) for distinguishing dementia from depression. We conclude that a single cross-sectional measurement of MTL width on CT does not help differentiate between different types of dementia, though it may provide some supportive evidence when distinguishing depression from dementia.

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          Most cited references 5

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          Visualisation and quantification of rates of atrophy in Alzheimer's disease

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            Detection in life of confirmed Alzheimer's disease using a simple measurement of medial temporal lobe atrophy by computed tomography

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              Rapidly progressing atrophy of medial temporal lobe in Alzheimer's disease

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                Author and article information

                Journal
                DEM
                Dement Geriatr Cogn Disord
                10.1159/issn.1420-8008
                Dementia and Geriatric Cognitive Disorders
                S. Karger AG
                1420-8008
                1421-9824
                2000
                April 2000
                25 February 2000
                : 11
                : 2
                : 114-118
                Affiliations
                aInstitute for the Health of the Elderly, University of Newcastle-upon-Tyne, and bGlasgow Homeopathic Hospital and the University Department of Medicine, Glasgow, UK
                Article
                17223 Dement Geriatr Cogn Disord 2000;11:114–118
                10.1159/000017223
                10705169
                © 2000 S. Karger AG, Basel

                Copyright: All rights reserved. No part of this publication may be translated into other languages, reproduced or utilized in any form or by any means, electronic or mechanical, including photocopying, recording, microcopying, or by any information storage and retrieval system, without permission in writing from the publisher. Drug Dosage: The authors and the publisher have exerted every effort to ensure that drug selection and dosage set forth in this text are in accord with current recommendations and practice at the time of publication. However, in view of ongoing research, changes in government regulations, and the constant flow of information relating to drug therapy and drug reactions, the reader is urged to check the package insert for each drug for any changes in indications and dosage and for added warnings and precautions. This is particularly important when the recommended agent is a new and/or infrequently employed drug. Disclaimer: The statements, opinions and data contained in this publication are solely those of the individual authors and contributors and not of the publishers and the editor(s). The appearance of advertisements or/and product references in the publication is not a warranty, endorsement, or approval of the products or services advertised or of their effectiveness, quality or safety. The publisher and the editor(s) disclaim responsibility for any injury to persons or property resulting from any ideas, methods, instructions or products referred to in the content or advertisements.

                Page count
                Figures: 1, Tables: 1, References: 22, Pages: 5
                Categories
                Original Research Article

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