Hyponatremia with Loss of High Signal Intensity in the Posterior Pituitary Lobe on T1-weighted Magnetic Resonance Imaging

Herein, we report on an 82-year-old woman who presented with anorexia. The patient had hyponatremia with preserved urinary osmotic pressure. T1-weighted magnetic resonance imaging (MRI) showed a lack of high signal intensity (SI) in the posterior pituitary lobe. Based on the patient's high leve...

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Autores principales: Kitagawa, Masayuki, Yamanaka, Yoshihiro, Adachi, Toru, Ito, Junitsu, Fukase, Kazutoshi, Ohta, Ikuro, Katagiri, Tadashi
Formato: Online Artículo Texto
Lenguaje:English
Publicado: The Japanese Society of Internal Medicine 2017
Materias:
Case Report
Acceso en línea:https://www.ncbi.nlm.nih.gov/pmc/articles/PMC5742394/
https://www.ncbi.nlm.nih.gov/pubmed/29021435
http://dx.doi.org/10.2169/internalmedicine.8616-16
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author Kitagawa, Masayuki
Yamanaka, Yoshihiro
Adachi, Toru
Ito, Junitsu
Fukase, Kazutoshi
Ohta, Ikuro
Katagiri, Tadashi
author_facet Kitagawa, Masayuki
Yamanaka, Yoshihiro
Adachi, Toru
Ito, Junitsu
Fukase, Kazutoshi
Ohta, Ikuro
Katagiri, Tadashi
author_sort Kitagawa, Masayuki
collection PubMed
description Herein, we report on an 82-year-old woman who presented with anorexia. The patient had hyponatremia with preserved urinary osmotic pressure. T1-weighted magnetic resonance imaging (MRI) showed a lack of high signal intensity (SI) in the posterior pituitary lobe. Based on the patient's high levels of N-terminal prohormone of brain natriuretic peptide (NT-proBNP), heart failure was suspected. The heart failure may have caused arginine vasopressin (AVP) secretion. The depletion of AVP secretory granules may therefore cause the posterior pituitary gland to disappear on T1-weighted MRI.
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spelling pubmed-57423942017-12-27 Hyponatremia with Loss of High Signal Intensity in the Posterior Pituitary Lobe on T1-weighted Magnetic Resonance Imaging Kitagawa, Masayuki Yamanaka, Yoshihiro Adachi, Toru Ito, Junitsu Fukase, Kazutoshi Ohta, Ikuro Katagiri, Tadashi Intern Med Case Report Herein, we report on an 82-year-old woman who presented with anorexia. The patient had hyponatremia with preserved urinary osmotic pressure. T1-weighted magnetic resonance imaging (MRI) showed a lack of high signal intensity (SI) in the posterior pituitary lobe. Based on the patient's high levels of N-terminal prohormone of brain natriuretic peptide (NT-proBNP), heart failure was suspected. The heart failure may have caused arginine vasopressin (AVP) secretion. The depletion of AVP secretory granules may therefore cause the posterior pituitary gland to disappear on T1-weighted MRI. The Japanese Society of Internal Medicine 2017-10-11 2017-12-01 /pmc/articles/PMC5742394/ /pubmed/29021435 http://dx.doi.org/10.2169/internalmedicine.8616-16 Text en Copyright © 2017 by The Japanese Society of Internal Medicine https://creativecommons.org/licenses/by-nc-nd/4.0/ The Internal Medicine is an Open Access article distributed under the Creative Commons Attribution-NonCommercial-NoDerivatives 4.0 International License. To view the details of this license, please visit (https://creativecommons.org/licenses/by-nc-nd/4.0/).
spellingShingle Case Report
Kitagawa, Masayuki
Yamanaka, Yoshihiro
Adachi, Toru
Ito, Junitsu
Fukase, Kazutoshi
Ohta, Ikuro
Katagiri, Tadashi
Hyponatremia with Loss of High Signal Intensity in the Posterior Pituitary Lobe on T1-weighted Magnetic Resonance Imaging
title Hyponatremia with Loss of High Signal Intensity in the Posterior Pituitary Lobe on T1-weighted Magnetic Resonance Imaging
title_full Hyponatremia with Loss of High Signal Intensity in the Posterior Pituitary Lobe on T1-weighted Magnetic Resonance Imaging
title_fullStr Hyponatremia with Loss of High Signal Intensity in the Posterior Pituitary Lobe on T1-weighted Magnetic Resonance Imaging
title_full_unstemmed Hyponatremia with Loss of High Signal Intensity in the Posterior Pituitary Lobe on T1-weighted Magnetic Resonance Imaging
title_short Hyponatremia with Loss of High Signal Intensity in the Posterior Pituitary Lobe on T1-weighted Magnetic Resonance Imaging
title_sort hyponatremia with loss of high signal intensity in the posterior pituitary lobe on t1-weighted magnetic resonance imaging
topic Case Report
url https://www.ncbi.nlm.nih.gov/pmc/articles/PMC5742394/
https://www.ncbi.nlm.nih.gov/pubmed/29021435
http://dx.doi.org/10.2169/internalmedicine.8616-16
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