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Smith CJ, Smith ZG, Rasool H, Cullen K, Ghosh M, Woolley TE, Uzun O, Loh NR, Tucker D, Syed YA. Unravelling the Clinical Co-Morbidity and Risk Factors Associated with Agenesis of the Corpus Callosum. J Clin Med 2023; 12:jcm12113623. [PMID: 37297816 DOI: 10.3390/jcm12113623] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/11/2023] [Revised: 05/18/2023] [Accepted: 05/19/2023] [Indexed: 06/12/2023] Open
Abstract
Agenesis of the Corpus Callosum (ACC) can result in multiple neurological deficits including social and behavioural issues. However, the underlying aetiology, clinical co-morbidity and the contributing risk factors remain elusive, resulting in inaccurate prognosis and delayed therapy. The main objective of this study was to comprehensively describe the epidemiology and clinical co-morbidity associated with patients diagnosed with ACC. The secondary objective was to identify the factors that contribute towards increased risk for ACC. For this, we analysed 22 years (1998-2020) of clinical data across the whole of Wales, UK collected through the Congenital Anomaly Register & Information Service (CARIS) and Public Health Wales (PHW). Our results demonstrate that complete ACC (84.1%) was the prevalent subtype, in comparison to partial ACC. Further, ventriculomegaly/hydrocephalus (26.37%) and ventricular septal defect (21.92%) were identified to be the most prevalent neural malformation (NM) and congenital heart disorder (CHD) in our cohort. Although 12.7% of subjects with ACC had both an NM and CHD, we found no significant association between them (χ2 (1, n = 220) = 3.84, p = 0.33). We found socioeconomic deprivation and increased maternal age contributed towards an increased risk for ACC. To the best of our knowledge, this study for the first time defines the clinical phenotypes and the factors that contribute to ACC within the Welsh population. These findings will be of value to both patients and healthcare professionals, who may take preventative or remedial measures.
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Affiliation(s)
- Callum J Smith
- Neuroscience and Mental Health Innovation Institute, Hadyn Ellis Building, Cardiff CF24 4HQ, UK
- School of Bioscience, Cardiff University, The Sir Martin Evans Building, Museum Ave., Cardiff CF10 3AX, UK
| | - Zoey G Smith
- Neuroscience and Mental Health Innovation Institute, Hadyn Ellis Building, Cardiff CF24 4HQ, UK
- School of Bioscience, Cardiff University, The Sir Martin Evans Building, Museum Ave., Cardiff CF10 3AX, UK
| | - Hania Rasool
- Neuroscience and Mental Health Innovation Institute, Hadyn Ellis Building, Cardiff CF24 4HQ, UK
- School of Bioscience, Cardiff University, The Sir Martin Evans Building, Museum Ave., Cardiff CF10 3AX, UK
| | - Katie Cullen
- Neuroscience and Mental Health Innovation Institute, Hadyn Ellis Building, Cardiff CF24 4HQ, UK
- School of Bioscience, Cardiff University, The Sir Martin Evans Building, Museum Ave., Cardiff CF10 3AX, UK
| | - Meghana Ghosh
- Neuroscience and Mental Health Innovation Institute, Hadyn Ellis Building, Cardiff CF24 4HQ, UK
- School of Bioscience, Cardiff University, The Sir Martin Evans Building, Museum Ave., Cardiff CF10 3AX, UK
| | | | - Orhan Uzun
- School of Mathematics, Cardiff University, Cardiff CF24 4AG, UK
| | - Ne Ron Loh
- University Hospital of Wales, Heath Park, Cardiff CF10 3AX, UK
- Royal United Hospitals Bath, NHS Foundation Trust, Bath BA1 3NG, UK
| | - David Tucker
- Knowledge Directorate, Public Health Wales, Swansea SA2 8QA, UK
| | - Yasir Ahmed Syed
- Neuroscience and Mental Health Innovation Institute, Hadyn Ellis Building, Cardiff CF24 4HQ, UK
- School of Bioscience, Cardiff University, The Sir Martin Evans Building, Museum Ave., Cardiff CF10 3AX, UK
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Shwe WH, Schlatterer SD, Williams J, du Plessis AJ, Mulkey SB. Outcome of Agenesis of the Corpus Callosum Diagnosed by Fetal MRI. Pediatr Neurol 2022; 135:44-51. [PMID: 35988419 DOI: 10.1016/j.pediatrneurol.2022.07.007] [Citation(s) in RCA: 8] [Impact Index Per Article: 4.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 02/04/2022] [Revised: 06/29/2022] [Accepted: 07/11/2022] [Indexed: 11/28/2022]
Abstract
BACKGROUND Fetal magnetic resonance imaging (MRI) is increasingly utilized for prenatal diagnosis of agenesis of the corpus callosum (ACC). This study aimed to (1) describe cases of ACC diagnosed by fetal MRI, (2) determine the frequency of postnatal confirmation by MRI, and (3) understand postnatal outcomes of infants with ACC. METHODS Maternal records from Children's National Hospital between January 2012 and June 2019 with a prenatal neurological consultation, fetal MRI, and ACC on imaging were included. Maternal, prenatal, and postnatal infant data were collected. Each case was categorized as complete or partial ACC and isolated or complex ACC by fetal MRI and group comparisons of outcomes were analyzed. RESULTS A total of 127 maternal-fetal dyads with ACC were categorized into 45 isolated-complete, 17 isolated-partial, 46 complex-complete, and 19 complex-partial ACC. Of 75 live births, 72 had postnatal evaluations. In 43 of 59 (73%) cases with postnatal neuroimaging, prenatal ACC subcategory was confirmed. Children with isolated or complex and with partial or complete ACC had similar rates of developmental delays and epilepsy. Complex ACC cases had worse outcomes than isolated ACC, with complex ACC having more postnatal dysmorphisms and abnormal feeding and vision compared with isolated ACC. Similar neurodevelopmental outcomes were seen for partial and complete ACC. CONCLUSIONS Children with isolated or complex ACC and with partial or complete ACC have a range of neurodevelopmental outcomes. Fetal and postnatal brain MRI is a valuable tool to understand differences of the corpus callosum that can guide genetic testing, prenatal counseling, and postnatal care.
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Affiliation(s)
- Wendy H Shwe
- George Washington University School of Medicine and Health Sciences, Washington, District of Columbia
| | - Sarah D Schlatterer
- Prenatal Pediatrics Institute, Children's National Hospital, Washington, District of Columbia; Department of Neurology, George Washington University School of Medicine and Health Sciences, Washington, District of Columbia; Department of Pediatrics, George Washington University School of Medicine and Health Sciences, Washington, District of Columbia
| | - Jordan Williams
- Howard University College of Medicine, Washington, District of Columbia
| | - Adre J du Plessis
- Prenatal Pediatrics Institute, Children's National Hospital, Washington, District of Columbia; Department of Neurology, George Washington University School of Medicine and Health Sciences, Washington, District of Columbia; Department of Pediatrics, George Washington University School of Medicine and Health Sciences, Washington, District of Columbia
| | - Sarah B Mulkey
- Prenatal Pediatrics Institute, Children's National Hospital, Washington, District of Columbia; Department of Neurology, George Washington University School of Medicine and Health Sciences, Washington, District of Columbia; Department of Pediatrics, George Washington University School of Medicine and Health Sciences, Washington, District of Columbia.
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Pânzaru MC, Popa S, Lupu A, Gavrilovici C, Lupu VV, Gorduza EV. Genetic heterogeneity in corpus callosum agenesis. Front Genet 2022; 13:958570. [PMID: 36246626 PMCID: PMC9562966 DOI: 10.3389/fgene.2022.958570] [Citation(s) in RCA: 5] [Impact Index Per Article: 2.5] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/31/2022] [Accepted: 09/05/2022] [Indexed: 11/18/2022] Open
Abstract
The corpus callosum is the largest white matter structure connecting the two cerebral hemispheres. Agenesis of the corpus callosum (ACC), complete or partial, is one of the most common cerebral malformations in humans with a reported incidence ranging between 1.8 per 10,000 livebirths to 230–600 per 10,000 in children and its presence is associated with neurodevelopmental disability. ACC may occur as an isolated anomaly or as a component of a complex disorder, caused by genetic changes, teratogenic exposures or vascular factors. Genetic causes are complex and include complete or partial chromosomal anomalies, autosomal dominant, autosomal recessive or X-linked monogenic disorders, which can be either de novo or inherited. The extreme genetic heterogeneity, illustrated by the large number of syndromes associated with ACC, highlight the underlying complexity of corpus callosum development. ACC is associated with a wide spectrum of clinical manifestations ranging from asymptomatic to neonatal death. The most common features are epilepsy, motor impairment and intellectual disability. The understanding of the genetic heterogeneity of ACC may be essential for the diagnosis, developing early intervention strategies, and informed family planning. This review summarizes our current understanding of the genetic heterogeneity in ACC and discusses latest discoveries.
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Affiliation(s)
- Monica-Cristina Pânzaru
- Department of Medical Genetics, Faculty of Medicine, “Grigore T. Popa” University of Medicine and Pharmacy, Iasi, Romania
| | - Setalia Popa
- Department of Medical Genetics, Faculty of Medicine, “Grigore T. Popa” University of Medicine and Pharmacy, Iasi, Romania
- *Correspondence: Setalia Popa, ; Vasile Valeriu Lupu,
| | - Ancuta Lupu
- Department of Pediatrics, Faculty of Medicine, “Grigore T. Popa” University of Medicine and Pharmacy, Iasi, Romania
| | - Cristina Gavrilovici
- Department of Pediatrics, Faculty of Medicine, “Grigore T. Popa” University of Medicine and Pharmacy, Iasi, Romania
| | - Vasile Valeriu Lupu
- Department of Pediatrics, Faculty of Medicine, “Grigore T. Popa” University of Medicine and Pharmacy, Iasi, Romania
- *Correspondence: Setalia Popa, ; Vasile Valeriu Lupu,
| | - Eusebiu Vlad Gorduza
- Department of Medical Genetics, Faculty of Medicine, “Grigore T. Popa” University of Medicine and Pharmacy, Iasi, Romania
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Corpus Callosum Agenesis: An Insight into the Etiology and Spectrum of Symptoms. Brain Sci 2020; 10:brainsci10090625. [PMID: 32916978 PMCID: PMC7565833 DOI: 10.3390/brainsci10090625] [Citation(s) in RCA: 31] [Impact Index Per Article: 7.8] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/12/2020] [Revised: 09/06/2020] [Accepted: 09/07/2020] [Indexed: 12/22/2022] Open
Abstract
Brain hemispheres are connected by commissural structures, which consist of white matter fiber tracts that spread excitatory stimuli to various regions of the cortex. This allows an interaction between the two cerebral halves. The largest commissure is the corpus callosum (CC) which is located inferior to the longitudinal fissure, serving as its lower border. Sometimes this structure is not completely developed, which results in the condition known as agenesis of the corpus callosum (ACC). The aim of this paper was to review the latest discoveries related to the genetic and metabolic background of ACC, including the genotype/phenotype correlations as well as the clinical and imaging symptomatology. Due to various factors, including genetic defects and metabolic diseases, the development of CC may be impaired in many ways, which results in complete or partial ACC. This creates several clinical implications, depending on the specificity of the malformation and other defects in patients. Epilepsy, motor impairment and intellectual disability are the most prevalent. However, an asymptomatic course of the disease is even more common. ACC presents with characteristic images on ultrasound and magnetic resonance imaging (MRI).
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