Fantasy (thought disturbances)

When fantasy becomes extended and distorted it can lead to thought disturbance due to the dislocation between reality and the imagined.

Narcissistic personality disorder
Two characteristics of someone with narcissistic personality disorder are:
 * A pervasive pattern of grandiosity (in fantasy or behavior)
 * Is preoccupied with fantasies of unlimited success, power, brilliance, beauty, or ideal love.