• Cristelle Chow, Marielle Valerie Fortier, Lena Das, Anuradha P Menon, Rashida Vasanwala, LamJoyce C MJCHaematology and Oncology Service, Department of Paediatric Subspecialties, KK Women's and Children's Hospital, Singapore., Zhi Min Ng, Simon Robert Ling, ChanDerrick W SDWNeurology Service, Department of Paediatrics, KK Women's and Children's Hospital, Singapore., Chew Thye Choong, Wendy K M Liew, and Terrence Thomas.
• Neurology Service, Department of Paediatrics, KK Women's and Children's Hospital, Singapore.
• Pediatr. Neurol. 2015 May 1; 52 (5): 521-5.

BackgroundAnatomical localization of the rapid-onset obesity with hypothalamic dysfunction, hypoventilation, and autonomic dysregulation (ROHHAD) syndrome has proved elusive. Most patients had neuroimaging after cardiorespiratory collapse, revealing a range of ischemic lesions.Patient DescriptionA 15-year-old obese boy with an acute febrile encephalopathy had hypoventilation, autonomic dysfunction, visual hallucinations, hyperekplexia, and disordered body temperature, and saltwater regulation. These features describe the ROHHAD syndrome. Cerebrospinal fluid analysis showed pleocytosis, elevated neopterins, and oligoclonal bands, and serology for systemic and antineuronal antibodies was negative. He improved after receiving intravenous steroids, immunoglobulins, and long-term mycophenolate. Screening for neural crest tumors was negative.ConclusionMagnetic resonance imaging of the brain early in his illness showed focal inflammation in the periaqueductal gray matter and hypothalamus. This unique localization explains almost all symptoms of this rare autoimmune encephalitis.Copyright © 2015 Elsevier Inc. All rights reserved.

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