To the Editor: We thank Dr. Taylor for raising several interesting questions about the consensus statement by the International Late-Onset Schizophrenia Group. Such issues have for many years intrigued those who see patients develop psychotic symptoms for the first time in later life. Schizophrenia is, indeed, currently conceptualized as a neurodevelopmental disorder, with onset in late adolescence and young adulthood, but our consensus group concluded that the research evidence base supports the existence of a minority group of patients who show all the features of schizophrenia, except that their illness onset is delayed into middle age. Such a psychosis, with onset after age 40, has been called late-onset schizophrenia since the 1940s (1). The evidence we reviewed does not support Dr. Taylor’s suggestion that these patients have a misdiagnosed atypical affective disorder.