Paraneoplastic disorders can lead to severe psychiatric and behavioural symptoms. Paraneoplastic limbic encephalitis (PLE) is a rare neurological syndrome associated with cancer, and selectively affects limbic system structures, including the hippocampus, hypothalamus, and amygdala.[1] The encephalitis is caused by an altered immunologic response to a malignancy that has antigens that resemble limbic antigens. The inflammatory response, however, occurs away from the original neoplasm site.[2]
The autoantibody response can be psychiatric in nature, and includes: