Mollaret's meningitis due to human herpesvirus 6 in an adolescent.

We report the first pediatric case of Mollaret meningitis in an adolescent female with acute lymphoblastic leukemia in remission. This patient had signs and symptoms consistent with meningitis, with three episodes over a 3-month period. Human herpesvirus 6 (HHV-6) was identified during her last episode from polymerase chain reaction assay of a cerebrospinal fluid specimen. She was treated successfully with foscarnet, after which HHV-6 was undetectable in her cerebrospinal fluid.