Anti–N-Methyl-D-Aspartate Receptor Encephalitis A Challenging Diagnosis in the Emergency DepartmentZhao, Bailey MD, MS*; Nelson, David G. MD†Pediatric Emergency Care: September 2019 - Volume 35 - Issue 9 - p e159–e161 doi: 10.1097/PEC.0000000000001853 Illustrative Cases Buy Abstract Author InformationAuthors Article MetricsMetrics Anti-N-methyl-D-aspartate receptor (NMDAR) encephalitis is an underdiagnosed disease that has been described thus far only in case series. Patients, the majority of which are females, develop neuropsychiatric symptoms that can often be misdiagnosed as purely psychiatric illness. Although teratomas are nearly pathognomonic for anti-NMDAR encephalitis, these are less common in children and males. This case illustrates some common features of anti-NMDAR encephalitis and some of the challenges in diagnosis. From the *Department of Emergency Medicine, University of Nevada School of Medicine †University Medical Center, Las Vegas, NV. Disclosure: The authors declare no conflict of interest. Reprints: Bailey Zhao, MD, MS, Department of Emergency Medicine, University of Nevada School of Medicine, 901 Rancho Lane, Suite 135, Las Vegas, NV 89106 (e-mail: firstname.lastname@example.org). Online date: July 2, 2019 Copyright © 2019 Wolters Kluwer Health, Inc. All rights reserved.