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• W1978625524 endingPage "1931" @default.
• W1978625524 startingPage "1923" @default.
• W1978625524 abstract "Subjects at their first psychotic episode show an enlarged volume of the pituitary gland, but whether this is due to hypothalamic–pituitary–adrenal (HPA) axis hyperactivity, or to stimulation of the prolactin-secreting cells by antipsychotic treatment, is unclear. We measured pituitary volume, using 1.5-mm, coronal, 1.5 T, high-resolution MRI images, in 78 patients at the first psychotic episode and 78 age- and gender-matched healthy controls. In all, 18 patients were antipsychotic-free (12 of these were antipsychotic-naïve), 26 were receiving atypical antipsychotics, and 33 were receiving typical antipsychotics. As hypothesized, patients had a larger pituitary volume than controls (+22%, p<0.001). When divided by antipsychotic treatment, and compared to controls, the pituitary volume was 15% larger in antipsychotic-free patients (p=0.028), 17% larger in patients receiving atypicals (p=0.01), and 30% larger in patients receiving typicals (p<0.001). Patients receiving typicals not only had the largest pituitary volume compared to controls but also showed a trend for a larger pituitary volume compared to the other patients grouped together (+11%, p=0.08). When divided by diagnosis, and compared to controls, the pituitary volume was 24% larger in patients with schizophrenia/schizophreniform disorder (n=40, p<0.001), 19% larger in depressed patients (n=13, p=0.022), 16% larger in bipolar patients (n=16, p=0.037), and 12% larger in those with other psychoses (n=9, p=0.2). In conclusion, the first-episode of a psychotic disorder is associated with a larger pituitary independently of the presence of antipsychotic treatment, and this could be due to activation of the HPA axis. Typical antipsychotics exert an additional enlarging effect on pituitary volume, likely to be related to activation of prolactin-secreting cells. This activation of the hormonal stress response could participate to the important metabolic abnormalities observed in patients with psychosis." @default.
• W1978625524 created "2016-06-24" @default.
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• W1978625524 date "2005-06-01" @default.
• W1978625524 modified "2023-10-18" @default.
• W1978625524 title "Increased Pituitary Volume in Antipsychotic-Free and Antipsychotic-Treated Patients of the Æsop First-Onset Psychosis Study" @default.
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• W1978625524 doi "https://doi.org/10.1038/sj.npp.1300766" @default.
• W1978625524 hasPubMedId "https://pubmed.ncbi.nlm.nih.gov/15956995" @default.
• W1978625524 hasPublicationYear "2005" @default.
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