Fludeoxyglucose positron emission tomography-computed tomography in limbic encephalitis.

A 66-year-old male patient presented with low grade fever without chills associated with simple partial seizures. He was advised whole body positron emission tomography-computed tomography (PET/CT) (fluorodeoxyglucose PET/CT) scan which demonstrated an increase in metabolic activity in the limbic system. There was no evidence of active disease anywhere else in the body. Thus, in the setting of limbic encephalitis PET-CT helps in locating the cancerous origin as well as gives information about functional abnormality of the brain.