TY - JOUR T1 - Case of anti-NMDA receptor encephalitis in a female adolescent with favourable response to second-line treatment with cyclophosphamide JF - BMJ Case Reports JO - BMJ Case Reports DO - 10.1136/bcr-2022-249991 VL - 15 IS - 8 SP - e249991 AU - April Faye Pamillaran Barbadillo AU - Rhea Angela Salonga Quimpo AU - Benilda Sanchez-Gan Y1 - 2022/08/01 UR - http://casereports.bmj.com/content/15/8/e249991.abstract N2 - We report the case of a female adolescent who presented with behavioural changes. She was admitted to our institution due to worsening psychiatric and neurological symptoms, subsequently diagnosed with anti-N-methyl-D-aspartate receptor encephalitis. Additional workup was facilitated to rule out a possible underlying teratoma, but all tests turned out unremarkable. First-line treatment with methylprednisolone pulse therapy and intravenous immunoglobulin was started, to which she showed marked improvement from baseline. One month after discharge, a decision for readmission was made because of persistent episodes of hallucinations, agitation and dyskinesias. In this case report, we highlight the use of cyclophosphamide over rituximab as second-line treatment in a resource-limited setting, owing to its greater availability and lesser cost. Cyclophosphamide treatment was given resulting in a more sustained clinical improvement with return to baseline function. ER -