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Adrenal Gland Diagnostic Accuracy of Computed Tomography in Predicting Primary Aldosteronism Subtype According to Age (Endocrinol Metab 2021;36:401-12, Seung Hun Lee et al.)
Seung Hun Lee1orcid, Jong Woo Kim2, Hyun-Ki Yoon2, Jung-Min Koh1, Chan Soo Shin3, Sang Wan Kim3,4, Jung Hee Kim3orcid
Endocrinology and Metabolism 2021;36(4):914-915.
DOI: https://doi.org/10.3803/EnM.2021.402
Published online: August 27, 2021

1Division of Endocrinology and Metabolism, Department of Medicine, Asan Medical Center, University of Ulsan College of Medicine, Seoul, Korea

2Department of Radiology and Research Institute of Radiology, Asan Medical Center, University of Ulsan College of Medicine, Seoul, Korea

3Department of Internal Medicine, Seoul National University College of Medicine, Seoul, Korea

4Department of Internal Medicine, Seoul Metropolitan Government Seoul National University Boramae Medical Center, Seoul, Korea

Corresponding author: Jung Hee Kim. Department of Internal Medicine, Seoul National University College of Medicine, 101 Daehak-ro, Jongno-gu, Seoul 03080, Korea, Tel: +82-2-2072-4839, Fax: +82-2-762-9662, E-mail: jhkxingfu@gmail.com
• Received: August 9, 2021   • Accepted: August 15, 2021

Copyright © 2021 Korean Endocrine Society

This is an Open Access article distributed under the terms of the Creative Commons Attribution Non-Commercial License (https://creativecommons.org/licenses/by-nc/4.0/) which permits unrestricted non-commercial use, distribution, and reproduction in any medium, provided the original work is properly cited.

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See the Original "Diagnostic Accuracy of Computed Tomography in Predicting Primary Aldosteronism Subtype According to Age" on page 401.
We appreciate the insightful comments from Dr. Singhania regarding our recent publication. We reported that patients with hypokalemia, a plasma aldosterone concentration >30.0 ng/dL, and unilateral lesions on computed tomography were at high risk of unilateral primary aldosteronism regardless of age [1]. We would like to respond as follows.
First, Dr. Singhania pointed out that the importance of hypokalemia in diagnosing primary aldosteronism—particularly unilateral adenoma—was overemphasized. We agree that the prevalence of hypokalemia was relatively low in patients with primary aldosteronism. However, the presence of hypokalemia might reflect the disease severity, and a recent clinical guideline suggested that the presence of hypokalemia enables bypassing confirmatory testing for primary aldosteronism [2]. Our study found that hypokalemia alone was not a significant predictor, but that it became a more significant predictor together with other criteria. Moreover, previous studies have suggested that hypokalemia is a significant predictor of unilateral primary aldosteronism [3–5].
Second, Dr. Singhania pointed out that confirmatory testing can be skipped in the clinical setting of hypertension, spontaneous hypokalemia with a plasma aldosterone concentration >555 pmol/L (>20 ng/dL), and plasma renin activity <1 ng/mL/hr (or a plasma renin concentration below the lower limit of the reference range). We also agree that confirmatory testing is not necessary for patients with primary aldosteronism, according to the previously-mentioned guideline [2]. However, our study included patients from 2000 to 2018, which included the period before the guideline was published. Thus, our two centers consistently conducted confirmatory tests in patients with primary aldosteronism.
We deeply appreciate Dr. Singhania’s valuable comments, which enriched the understanding of our article.

CONFLICTS OF INTEREST

No potential conflict of interest relevant to this article was reported.

  • 1. Lee SH, Kim JW, Yoon HK, Koh JM, Shin CS, Kim SW, et al. Diagnostic accuracy of computed tomography in predicting primary aldosteronism subtype according to age. Endocrinol Metab (Seoul) 2021;36:401–12.ArticlePubMedPMC
  • 2. Funder JW, Carey RM, Mantero F, Murad MH, Reincke M, Shibata H, et al. The management of primary aldosteronism: case detection, diagnosis, and treatment: an Endocrine Society Clinical Practice Guideline. J Clin Endocrinol Metab 2016;101:1889–916.ArticlePubMed
  • 3. Kupers EM, Amar L, Raynaud A, Plouin PF, Steichen O. A clinical prediction score to diagnose unilateral primary aldosteronism. J Clin Endocrinol Metab 2012;97:3530–7.ArticlePubMed
  • 4. Umakoshi H, Ogasawara T, Takeda Y, Kurihara I, Itoh H, Katabami T, et al. Accuracy of adrenal computed tomography in predicting the unilateral subtype in young patients with hypokalaemia and elevation of aldosterone in primary aldosteronism. Clin Endocrinol (Oxf) 2018;88:645–51.ArticlePubMed
  • 5. Kobayashi H, Abe M, Soma M, Takeda Y, Kurihara I, Itoh H, et al. Development and validation of subtype prediction scores for the workup of primary aldosteronism. J Hypertens 2018;36:2269–76.ArticlePubMed

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      Journal of the Formosan Medical Association.2024; 123: S114.     CrossRef
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