Tehran University of Medical Sciences Case Reports in Clinical Practice 2538-2683 6 S1 2022 07 06 298 302 Ruohollah Seddigh Research center of addiction and risky behavior, Department of psychiatry, school of medicine, Iran University of Medical Sciences, Tehran, Iran. Amir-Abbas Keshavarz-Akhlaghi Research center of addiction and risky behavior, Department of psychiatry, school of medicine, Iran University of Medical Sciences, Tehran, Iran. Mahdieh Saeidi Department of Psychiatry, School of Medicine, Iran University of Medical Sciences, Tehran, Iran. 2021 02 26 2021 05 10 Stress has a significant role in developing Acute and Transient Psychotic Disorder (ATPD). The condition resolves after stress termination without relapse for long years in many cases. So this kind of psychosis can be different from other psychosis in terms of etiology and prognosis. We report an 18-year-old male patient with an acute and transient psychotic disorder who experienced a psychotic episode after a rape. His psychosis was remitted without any antipsychotic medications. This case raises an important question: Why should this kind of psychosis be classified under a psychotic branch of psychiatric disorders classification and not under more benign disorders such as adjustment disorder. https://crcp.tums.ac.ir/index.php/crcp/article/view/485