Dissociative disorder is a disorder in which traumatic events or strong conflicts lead to a variety of symptoms such as impairment of memory and consciousness and personality changes. It can be said that the symptoms are a defense mechanism to protect oneself from traumatic experiences and daily persistent psychological factors, and it is necessary to flexibly respond to the unique psychological factors that led to the dissociation for the essential treatment. In this study, we experienced a case of dissociative disorder in an adolescent girl who presented with a variety of symptoms such as self-injurious behavior with personality change and anorexia. Although it was difficult to treat her because of her unique view of life and death, we were able to improve her symptoms through trial and error during her 3-month hospitalization. In autism spectrum disorder, there are cases where psychological intervention is difficult due to bizarre interpretations. In such cases, persistent intervention through a multidisciplinary team of professionals can sometimes bring light to the situation, and in this case, the presence of medical students allowed us to share a concrete vision of the future, which led to a clue to a solution. We hope to gain further knowledge on effective intervention situations and methods by accumulating more such cases in the future.
 Authors' abstract