A 37 year old women works on the evening shift in the post office sorting mail. She began hearing voices making critical comments about her behavior approximately 6 years before and became concerned that someone was trying to influence her mind. At that time she worked as a secretary in a large company. Her work was considered good and she was respected, although people commented that she seemed aloof and somewhat isolated. She was successfully treated with neuroleptic medication that prevented the voices and decreased her concern about external influence of her mind. However, she never regained her former level of competency at work and eventually left her job as a secretary and sought employment at the post office. The best diagnosis, based on her history, is:
O Brief psychotic episode
O Major depression with psychotic features
O Schizophrenia
O Bipolar disorder, manic phase