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Case Reports in Medicine
Volume 2012, Article ID 679257, 3 pages
Case Report

Extrapontine Myelinolysis of Osmotic Demyelination Syndrome in a Case of Postoperative Suprasellar Arachnoid Cyst

1Department of Neurosurgery, Beijing Tiantan Hospital, Capital Medical University, Beijing 100050, China
2Beijing Neurosurgical Institute, Capital Medical University, No. 6 Tiantan Xili, Chongwen District, Beijing 100050, China

Received 19 August 2012; Accepted 19 December 2012

Academic Editor: Richard A. Wennberg

Copyright © 2012 Peng Zhao 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.


The extrapontine myelinolysis of osmotic demyelination syndrome (ODS) is a well-known but uncommon disorder of the central nervous system. Although the mechanism is not fully understood and the treatment is controversial, hyponatremia is probably considered to be the main pathophysiological basis. There are few reports of ODS caused by a sellar lesion. Here we present a case of suprasellar arachnoid cyst that developed extrapontine myelinolysis of ODS after a neuroendoscopic treatment procedure. It is suggested that patients with suprasellar lesions are at risk of developing extrapontine myelinolysis of ODS and correction of hyponatremia in these cases should be closely monitored.