Although the onset of psychotic symptoms before the age of 13 years is exceedingly rare, the incidence of schizophrenia rises sharply after the onset of puberty.1 Only 1% of the population has schizophrenia and 30% of these patients experience an onset of psychotic symptoms by age 18 years.2-8 The period that precedes the onset of frank psychotic symptoms (ie, the prodromal phase) has not been well characterized in early-onset schizophrenia-spectrum disorders (EOSS), but retrospective reports have shown that symptoms include high levels of depression and anxiety, emerging cognitive and social deficits, unusual thought content, and (not infrequently) school failure.
