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Lithium-Associated Hypercalcemia: Pathophysiology, Prevalence, Management

Journal article
Authors A. D. Meehan
R. Udumyan
Mathias Kardell
Mikael Landén
J. Jarhult
G. Wallin
Published in World Journal of Surgery
Volume 42
Issue 2
Pages 415-424
ISSN 0364-2313
Publication year 2018
Published at Institute of Neuroscience and Physiology, Department of Psychiatry and Neurochemistry
Pages 415-424
Language en
Links doi.org/10.1007/s00268-017-4328-5
Keywords primary hyperparathyroidism, bipolar disorder, therapy, parathyroidectomy, history, society, disease, era, Surgery, hou m, 1954, journal of neurology neurosurgery and psychiatry, v17, p250, henry cr, 1990, surgery11th annual meeting of the american assoc of endocrine
Subject categories Endocrinology and Diabetes

Abstract

Background Lithium-associated hypercalcemia (LAH) is an ill-defined endocrinopathy. The aim of the present study was to determine the prevalence of hypercalcemia in a cohort of bipolar patients (BP) with and without concomitant lithium treatment and to study surgical outcomes for lithium-associated hyperparathyroidism. Methods Retrospective data, including laboratory results, surgical outcomes and medications, were collected from 313 BP treated with lithium from two psychiatric outpatient units in central Sweden. In addition, data were collected from 148 BP without lithium and a randomly selected control population of 102 individuals. Logistic regression was used to compare odds of hypercalcemia in these respective populations. Results The prevalence of lithium-associated hypercalcemia was 26%. Mild hypercalcemia was detected in 87 out of 563 study participants. The odds of hypercalcemia were significantly higher in BP with lithium treatment compared with BP unexposed to lithium (adjusted OR 13.45; 95% CI 3.09, 58.55; p = 0.001). No significant difference was detected between BP without lithium and control population (adjusted OR 2.40; 95% CI 0.38, 15.41; p = 0.355). Seven BP with lithium underwent surgery where an average of two parathyroid glands was removed. Parathyroid hyperplasia was present in four patients (57%) at the initial operation. One patient had persistent disease after the initial operation, and six patients had recurrent disease at follow-up time which was on average 10 years. Conclusion The high prevalence of LAH justifies the regular monitoring of calcium homeostasis, particularly in high-risk groups. If surgery is necessary, bilateral neck exploration should be considered in patients on chronic lithium treatment. Prospective studies are needed.

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