Paranoi personality disorder is a psychiatric diagnosis characterized by paranoia characterized by a pervasive and long-standing suspiciousness and generalized mistrust of others. (DSM-IV) For a person's personality to be considered a personality disorder, an enduring pattern of characteristic maladaptive behaviors, thinking and personality traits must be present from the onset of adolescence or early adulthood. Additionally, these behaviors, traits and thinking must be present to the extent that they cause significant difficulties in relationships, employment and other facets of functioning.