LETTERS Possession Trance, Epilepsy, and Primary Psychosis: the Challenges in Diagnosis and Management To the Editor: ‘Trance ’ derives from

the Latin words transitus (a passage) and transpire (to pass over). The most common clinical features of a trance state are amnesia, emotional disturbances and loss of identity.1 It is clinically challenging to differ-entiate behavior changes resulting from epilepsy, functional psychosis, and culturally sanctioned ‘posses-sion ’ states. These two cases illustrate this challenge. Case Report #1 X is a 56-year-old Chinese woman with no significant medical or psy-chiatric history. She came fro