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Case Reports in Pediatrics
Volume 2018, Article ID 4281217, 4 pages
Case Report

A 27-Month-Old Boy with Polyuria and Polydipsia

1Department of Pediatrics, Section of Endocrinology, Kaiser Permanente Oakland Medical Center, Oakland, CA, USA
2Department of Pediatrics, Section of Nephrology, University of California, San Francisco, San Francisco, CA, USA
3Department of Pediatrics, Section of Nephrology, University of California, Davis, Sacramento, CA, USA

Correspondence should be addressed to Stephanie Nguyen; ude.sivadcu@neyugnats

Received 16 May 2018; Accepted 1 August 2018; Published 23 August 2018

Academic Editor: Anselm Chi-wai Lee

Copyright © 2018 Yvonne Lee et al. This is an open access article distributed under the Creative Commons Attribution License, which permits unrestricted use, distribution, and reproduction in any medium, provided the original work is properly cited.


Psychogenic polydipsia is a well-described phenomenon in those with a diagnosed psychiatric disorder such as schizophrenia and anxiety disorders. Primary polydipsia is differentiated from psychogenic polydipsia by the lack of a clear psychotic disturbance. We present a case of a 27-month-old boy who presented with polyuria and polydipsia. Laboratory studies, imaging, and an observed water deprivation test were consistent with primary polydipsia. Polydipsia resolved after family limited his fluid intake and began replacing water drinking with other transition objects and behaviors for self-soothing. This case highlights the importance of water deprivation testing to differentiate between causes of polyuria, thereby avoiding misdiagnosis and iatrogenic hyponatremia. Secondly, primary polydipsia can result during the normal stages of child development without overt psychiatric disturbances.