Cited by 76Genomic variations and chromosomal abnormalitiesSchizophrenia research and treatmentFetal and Pediatric Neurological Disorders

Neuropathologic Features in Adults with 22q11.2 Deletion Syndrome

Kiehl, T. R., Chow, E. W. C., Mikulis, D. J., George, S. R., Bassett, A. S.·2009·Cerebral Cortex

Abstract

The 22q11.2 deletion syndrome (22qDS) is the most common microdeletion syndrome in humans. Its multisystem manifestations include congenital anomalies and neuropsychiatric disorders such as schizophrenia. Structural neuroimaging shows various abnormalities, but no postmortem brain studies exist. We report neuropathologic findings in 3 individuals from a cohort of 100 adults with a confirmed 22q11.2 deletion. All 3 had schizophrenia. Postmortem examination of Case 1, a 44-year-old male, revealed bilateral periventricular nodular heterotopia in the frontal lobes and ectopic neurons scattered throughout the frontal white matter. Cases 2 (male, aged 22 years) and 3 (female, 52 years) showed no evidence of migration abnormalities, but both had extensive astrocytic gliosis and focal collections of macrophages in the cerebral white matter, suggestive of cerebrovascular pathology. Review of magnetic resonance imaging findings available for 66 other subjects in the cohort revealed polymicrogyria in one and right cerebellar disorganization in another of the 26 subjects with schizophrenia. The results support previous neuroimaging reports suggesting that neuronal migration abnormalities may be a feature of 22qDS. Both early developmental brain abnormalities and fetal and later microvascular pathology may play a role in the pathogenesis of the neuropsychiatric phenotype of 22qDS, including white matter abnormalities and schizophrenia.

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Crossref · 10.1093/cercor/bhn066

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  • Imaging studies in 22q11.2 syndrome have revealed smaller brain volume, decreased cortical thickness in the superior parietal, right parietooccipital and inferior frontal gyrus, heterotopias and fewer gyri, and reduced volume in the hippocampus, cerebellum and amygdala, some of which varies based on the presence of schizophrenia or cognitive deficits.

    “Imaging studies in 22q11.2 syndrome have revealed smaller brain volume [361], decreased cortical thickness in the superior parietal, right parietooccipital and inferior frontal gyrus, heterotopias and fewer gyri [27, 193, 314], and reduced volume in the hippocampus [84, 85], cerebellum [49] and amygdala [85], some of which varies based on the presence of schizophrenia or cognitive deficits [20, 31”

    From Autism spectrum disorder: neuropathology and animal models (2017) · cites this paper as [193]

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Authors
Kiehl, T. R., Chow, E. W. C., Mikulis, D. J., George, S. R., & Bassett, A. S.
Affiliations
  • University Health Network (CA)
  • Centre for Addiction and Mental Health (CA)
Venue
Cerebral Cortex
Published
2008-05-14
Volume
19
Issue
1
Pages
153-164
ISSN
  • 1047-3211 (ISSN-L)
  • 1460-2199
OpenAlex
W2131053422
Cited by
76
References
51
Citations by year
2026: 3 · 2025: 1 · 2024: 2 · 2023: 2 · 2022: 1 · 2021: 10 · 2020: 2 · 2019: 2 · 2018: 2 · 2017: 5 · 2016: 6 · 2015: 8 · 2014: 9 · 2013: 7 · 2012: 3
FWCI
2.47
Type
journal article
Language
en
Open access
closed
Locations
  • Cerebral Cortex (publishedVersion)
  • PubMed (publishedVersion)
Topics
  • Life Sciences › Biochemistry, Genetics and Molecular Biology › Genetics › Genomic variations and chromosomal abnormalities
  • Health Sciences › Medicine › Psychiatry and Mental health › Schizophrenia research and treatment
  • Health Sciences › Medicine › Pediatrics, Perinatology and Child Health › Fetal and Pediatric Neurological Disorders
Keywords
22q11.2 deletion syndrome, schizophrenia, neuropathology, periventricular nodular heterotopia, astrocytic gliosis, cerebrovascular pathology, polymicrogyria, white matter abnormalities, microdeletion syndromes, adult brain
MeSH terms
Adult, Brain, DiGeorge Syndrome, Female, Humans, Male, Middle Aged, Nerve Fibers, Myelinated, Neurons, Schizophrenia

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