Progressive ventricular expansion in chronic poor-outcome schizophrenia

Area of Science:

• Neuroimaging
• Psychiatry
• Neurology

Background:

• Longitudinal studies suggest a link between ventricular enlargement and poor schizophrenia outcomes early in the disease.
• However, changes in ventricular size during the chronic phase of schizophrenia are less understood.

Purpose of the Study:

• To compare progressive changes in lateral ventricular size in chronic schizophrenia patients with good versus poor outcomes.
• To investigate the relationship between ventricular enlargement and functional outcomes in schizophrenia.

Main Methods:

• Magnetic Resonance Imaging (MRI) was used to assess lateral ventricular size.
• 49 chronic schizophrenia patients (26 poor outcome, 23 good outcome) and 16 healthy controls were scanned twice, 4 years apart.

Main Results:

• Schizophrenia patients showed significantly enlarged lateral ventricles compared to healthy controls at baseline and follow-up.
• No significant differences in overall longitudinal ventricular expansion were found between schizophrenia patients and controls.
• The poor-outcome (Kraepelinian) schizophrenia group exhibited more pronounced progressive enlargement of the posterior horn than the good-outcome group.

Conclusions:

• Excessive ventricular enlargement in chronic schizophrenia may be specifically associated with poor functional outcomes.
• Posterior horn enlargement progression could serve as a potential biomarker for poor functional prognosis in schizophrenia.