anti-n-methyl-d-aspartate receptor (anti-nmdar) encephalitis is is most common form ofimmune-mediated encephalitis with prominent neurologic and psychiatric features at disease onset. we describe a 16 years old patient who presented with fever and status epilepticus. his mri sequences was normal. anti-nmdar antibodies were detected in the csf. mri, ct and other studies didn,t show any tumor.