The authors examined the reports of MRI brain studies of 69 patients
with DSM-III-R-diagnosed psychotic disorders (30 early-onset and 24
late-onset schizophrenia patients and 15 with other psychoses) and 41
normal comparison subjects. Participants' ages ranged from 45 to 87 years.
A qualitative rating scheme determined type and severity of clinically
detectable abnormalities, including volume loss, infarcts, lacunae, and
white matter hyperintensities. In this clinically well- characterized
sample, the vast majority of the MRIs were within normal limits. There were
no significant differences between psychosis patients and normal comparison
subjects or between early-onset and late- onset schizophrenia patients in
frequency, type, or severity of gross structural abnormalities. The results
indicate that late-onset schizophrenia and related disorders can exist
without clinically significant gross structural abnormalities in the
brain.Abstract Teaser