TPO and psychotic disorder: TPO antibodies are also found in 10% of patients with psychiatric admissions (affective disorders, schizophrenia, dementia, other psychosis and personality disorders) (Oomen et al., 1996), up to 28% of patients with degenerative dementia (Kalmijn et al., 2000) and 14% of patients with genetic cerebellar ataxias (Sivera et al., 2012).