Answer: A
Anti-NMDA receptor limbic encephalitis has a female predominance, and it can also be found in male. In female, it is associated with ovarian teratoma. Approximately 50 percent of female patients older than 18 have uni- or bilateral ovarian teratomas, less than 9 percent of girls younger than 14 years have a teratoma. In male, detection of a tumor is rare, but it has been reported to be associated with testicular tumor, germ cell tumor, teratoma of the mediastinum, small cell lung carcinoma, Hodgkin’s lymphoma, and neuroblastoma.
Reference
2012 Jan 17 – HKSCCM & HKACCN Interhospital Grand Round: When No Manageable Diagnosis Available