A 17 year-old female is brought to your office by her family members because she has been imagining things that are not grounded in reality. The symptoms started rapidly after the spring break holidays. For 5 months she can see the aliens coming on a mission to colonize this planet; she hears ‘satellite signals’ sent from an alien group who are stationed on a UFO; she smells the fumes coming out of the UFO engines. She believes that she and her family would be the first victims of the alien invasion. Her family reports that most of the time, she speaks in a flat voice, she stops in the middle of a sentence, uses words that have no meaning, and even when she expresses very dangerous scenarios, she expresses no emotions on her face. She dresses up oddly, like wearing winter gloves in summer. She takes a shower only once a week when the family members insist. She does not clean up after things get messy. She does not pay attention to the professors in the class and ‘stays in her own world’. Which of the following is the most likely diagnosis in this patient?
