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      Diagnosis of ACTH Deficiency

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          Abstract

          Test sensitivity and accuracy of 250 μg/m<sup>2</sup> ACTH test, 1 μg/m<sup>2</sup> ACTH test, and overnight metyrapone test were evaluated in 158 children at risk for ACTH deficiency. Of 38 given high-dose ACTH, 20 had normal responses to metyrapone and to high-dose ACTH. 14 had low response to metyrapone; of these only 2 had low cortisol response (<550 nmol/l) to high-dose ACTH. Of 120 given low-dose ACTH, 64 had normal responses to metyrapone and to low-dose ACTH. All 24 with low metyrapone response had low or borderline response to low-dose ACTH. The remaining children had an inconclusive metyrapone response. In conclusion, high-dose ACTH misses most diagnoses of ACTH deficiency (21% sensitivity, 100% specificity, 63% accuracy). In contrast, the low dose ACTH test accurately diagnoses 90% of patients with ACTH deficiency (100% sensitivity, 68% specificity). The low-dose ACTH test can serve as an accurate and practical screening test for adequacy of ACTH reserve.

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          Most cited references 5

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              Comparison of the Low Dose Short Synacthen Test (1  g), the Conventional Dose Short Synacthen Test (250  g), and the Insulin Tolerance Test for Assessment of the Hypothalamo-Pituitary-Adrenal Axis in Patients with Pituitary Disease

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                Author and article information

                Journal
                HRE
                Horm Res Paediatr
                10.1159/issn.1663-2818
                Hormone Research in Paediatrics
                S. Karger AG
                1663-2818
                1663-2826
                1999
                August 1999
                03 February 2000
                : 52
                : 2
                : 73-79
                Affiliations
                Department of Pediatrics, University of Tennessee, Memphis and Methodist LeBonheur Children’s Medical Center, Memphis, Tenn., USA
                Article
                23438 Horm Res 1999;52:73–79
                10.1159/000023438
                10681636
                © 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: 3, References: 37, Pages: 7
                Categories
                Original Paper

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