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Grey matter and other structural brain abnormalities are consistently
reported in first-onset schizophrenia, but less is known about the extent
of neuroanatomical changes in first-onset affective psychosis
To determine which brain abnormalities are specific to (a) schizophrenia
and (b) affective psychosis
We obtained dual-echo (proton density/T2-weighted) magnetic resonance
images and carried out voxel-based analysis on the images of 73 patients
with first-episode psychosis (schizophrenia n=44,
affective psychosis n=29) and 58 healthy controls
Both patients with schizophrenia and patients with affective psychosis
had enlarged lateral and third ventricle volumes. Regional cortical grey
matter reductions (including bilateral anterior cingulate gyrus, left
insula and left fusiform gyrus) were evident in affective psychosis but
not in schizophrenia, although patients with schizophrenia displayed
decreased hippocampal grey matter and increased striatal grey matter at a
more liberal statistical threshold
Both schizophrenia and affective psychosis are associated with volumetric
abnormalities at the onset of frank psychosis, with some of these evident
in common brain areas
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