We report a rare case of altered mental status in a young patient with immature ovarian teratoma. A 22-year-old
woman presented with seizures, hallucination, amnesia and orofacial dyskinesia. Examination and investigation
revealed an ovarian massand asalphing-oophorectomy was performed. The histopathological examination result
showed an immature teratoma grade 2 with thepresence of immature primitive glial tissue. Her CSF N-Methyl-DAspartic
acid receptor (Anti-NMDAR) antibodytest was positive. N-Methyl-D-Aspartic acid receptor antibody
associated limbic encephalitis is an autoimmune antibody-mediated neuropsychiatric disorder. Resection of the
tumour and immunotherapy resulted in full recovery.
Anti-N-Methyl-D-Aspartate Receptor Encephalitis