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Jones RS, Donahue MJ, Davis LT, Pruthi S, Waddle SL, Custer C, Patel NJ, DeBaun MR, Kassim AA, Rodeghier M, Jordan LC. Silent infarction in sickle cell disease is associated with brain volume loss in excess of infarct volume. Front Neurol 2023; 14:1112865. [PMID: 37064181 PMCID: PMC10102616 DOI: 10.3389/fneur.2023.1112865] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/30/2022] [Accepted: 03/10/2023] [Indexed: 04/03/2023] Open
Abstract
Introduction Sickle cell disease (SCD) increases cerebral infarct risk, but reported effects on brain volume have varied. More detailed information using larger cohorts and contemporary methods could motivate the use of longitudinal brain volume assessment in SCD as an automated marker of disease stability or future progression. The purpose of this study was to rigorously evaluate whether children and young adults with SCD have reduced gray matter volume (GMV) and white matter volume (WMV) compared to healthy controls using high-resolution MRI. We tested the hypotheses that (i) elevated CBF, a marker of cerebral hemodynamic compensation in SCD, is associated with global and regional brain atrophy, and (ii) silent cerebral infarct burden is associated with brain atrophy in excess of infarct volume. Methods Healthy controls (n = 49) and SCD participants without overt stroke (n = 88) aged 7-32 years completed 3 T brain MRI; pseudocontinuous arterial spin labeling measured CBF. Multivariable linear regressions assessed associations of independent variables with GMV, WMV, and volumes of cortical/subcortical regions. Results Reduced hemoglobin was associated with reductions in both GMV (p = 0.032) and WMV (p = 0.005); reduced arterial oxygen content (CaO2) was also associated with reductions in GMV (p = 0.035) and WMV (p = 0.006). Elevated gray matter CBF was associated with reduced WMV (p = 0.018). Infarct burden was associated with reductions in WMV 30-fold greater than the infarct volume itself (p = 0.005). Increased GM CBF correlated with volumetric reductions of the insula and left and right caudate nuclei (p = 0.017, 0.017, 0.036, respectively). Infarct burden was associated with reduced left and right nucleus accumbens, right thalamus, and anterior corpus callosum volumes (p = 0.002, 0.002, 0.009, 0.002, respectively). Discussion We demonstrate that anemia and decreased CaO2 are associated with reductions in GMV and WMV in SCD. Increased CBF and infarct burden were also associated with reduced volume in subcortical structures. Global WMV deficits associated with infarct burden far exceed infarct volume itself. Hemodynamic compensation via increased cerebral blood flow in SCD seems inadequate to prevent brain volume loss. Our work highlights that silent cerebral infarcts are just a portion of the brain injury that occurs in SCD; brain volume is another potential biomarker of brain injury in SCD.
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Affiliation(s)
- R. Sky Jones
- Division of Pediatric Neurology, Department of Pediatrics, Vanderbilt University Medical Center, Nashville, TN, United States
| | - Manus J. Donahue
- Department of Radiology, Vanderbilt University Medical Center, Nashville, TN, United States
- Department of Neurology, Vanderbilt University Medical Center, Nashville, TN, United States
- Department of Psychiatry, Vanderbilt University Medical Center, Nashville, TN, United States
| | - L. Taylor Davis
- Department of Radiology, Vanderbilt University Medical Center, Nashville, TN, United States
| | - Sumit Pruthi
- Department of Radiology, Vanderbilt University Medical Center, Nashville, TN, United States
| | - Spencer L. Waddle
- Department of Radiology, Vanderbilt University Medical Center, Nashville, TN, United States
| | - Chelsea Custer
- Division of Pediatric Neurology, Department of Pediatrics, Vanderbilt University Medical Center, Nashville, TN, United States
- Department of Radiology, Vanderbilt University Medical Center, Nashville, TN, United States
| | - Niral J. Patel
- Division of Pediatric Neurology, Department of Pediatrics, Vanderbilt University Medical Center, Nashville, TN, United States
- Department of Radiology, Vanderbilt University Medical Center, Nashville, TN, United States
| | - Michael R. DeBaun
- Vanderbilt-Meharry Center of Excellence in Sickle Cell Disease, Nashville, TN, United States
| | - Adetola A. Kassim
- Division of Hematology and Oncology, Department of Medicine, Vanderbilt University Medical Center, Nashville, TN, United States
| | | | - Lori C. Jordan
- Division of Pediatric Neurology, Department of Pediatrics, Vanderbilt University Medical Center, Nashville, TN, United States
- Department of Radiology, Vanderbilt University Medical Center, Nashville, TN, United States
- Department of Neurology, Vanderbilt University Medical Center, Nashville, TN, United States
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Roane JL, Mio M, Viner J, Bettridge A, Heyn C, Roifman I, Selkirk B, Kertes P, MacIntosh BJ, Thayalasuthan V, Detzler G, Endre R, Jimenez-Juan L, Henry B, Murray BJ, Goldstein BI. Incidental Findings Among Youth Participating in Multimodal Imaging Research: Characteristics of Findings and Description of a Management Approach. Front Pediatr 2022; 10:875934. [PMID: 35813368 PMCID: PMC9259791 DOI: 10.3389/fped.2022.875934] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 02/14/2022] [Accepted: 05/19/2022] [Indexed: 11/28/2022] Open
Abstract
Research imaging in healthy and clinical youth populations yields incidental findings that require a management strategy. Our primary objective was to document the frequency and nature of incidental findings within a research group integrating multiple imaging modalities. A second objective was to describe the evolution of an approach to handling incidental findings. A case example was included to display the intricacies of some of these scenarios. Youth, ages 13-20 years, with bipolar disorder, familial risk for bipolar disorder, or healthy controls, obtained one or a combination of neuroimaging, cardio-thoracic imaging, retinal imaging, and carotid imaging. All images were systematically reviewed for incidental findings. Overall, of 223 participants (n = 102 healthy controls), 59% (n = 131) had a brain magnetic resonance imaging (MRI) incidental finding and 27% (n = 60) had at least one incidental brain finding requiring non-urgent follow-up. In addition, of 109 participants with chest/cardiac MRI and carotid ultrasound, 3% (n = 3) had chest findings, 2% (n = 2) had cardiac findings, and 1% (n = 1) had a carotid finding. Of 165 youth with retinal imaging, 1% (n = 2) had incidental findings. While the vast majority of these incidental findings were of a non-serious, non-urgent nature, there were noteworthy exceptions. Imaging research groups need a system that emphasizes the value of clinical review of research images and one that is collaborative and responsive in order to inform follow-up plans. Rating systems that have been developed and used in neuroimaging for the classification of incidental findings can be adapted for use in areas other than the brain. Regardless of severity, incidental findings may raise anxiety in youth participants and their parents. The optimal threshold is one that balances transparency with utility.
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Affiliation(s)
- Jessica L Roane
- Sunnybrook Research Institute, Toronto, ON, Canada.,Centre for Youth Bipolar Disorder, Centre for Addiction and Mental Health, Toronto, ON, Canada
| | - Megan Mio
- Sunnybrook Research Institute, Toronto, ON, Canada.,Centre for Youth Bipolar Disorder, Centre for Addiction and Mental Health, Toronto, ON, Canada.,Department of Pharmacology & Toxicology, University of Toronto, Toronto, ON, Canada
| | - Jacqueline Viner
- Department of Classics, University of Toronto, Toronto, ON, Canada
| | - Ariel Bettridge
- Sunnybrook Research Institute, Toronto, ON, Canada.,Centre for Youth Bipolar Disorder, Centre for Addiction and Mental Health, Toronto, ON, Canada
| | - Chinthaka Heyn
- Sunnybrook Research Institute, Toronto, ON, Canada.,Department of Medical Imaging, University of Toronto, Toronto, ON, Canada.,Department of Medical Imaging, Sunnybrook Health Sciences Centre, Toronto, ON, Canada
| | - Idan Roifman
- Sunnybrook Research Institute, Toronto, ON, Canada.,Department of Medicine, University of Toronto, Toronto, ON, Canada.,Department of Medicine, Sunnybrook Health Sciences Centre, Toronto, ON, Canada
| | - Beth Selkirk
- Department of Ophthalmology & Vision Sciences, Sunnybrook Health Sciences Centre, Toronto, ON, Canada
| | - Peter Kertes
- Sunnybrook Research Institute, Toronto, ON, Canada.,Department of Ophthalmology & Vision Sciences, Sunnybrook Health Sciences Centre, Toronto, ON, Canada.,Department of Ophthalmology & Visions Sciences, University of Toronto, Toronto, ON, Canada
| | - Bradley J MacIntosh
- Sunnybrook Research Institute, Toronto, ON, Canada.,Department of Medical Biophysics, University of Toronto, Toronto, ON, Canada
| | | | - Garry Detzler
- Sunnybrook Research Institute, Toronto, ON, Canada.,Department of Medical Imaging, Sunnybrook Health Sciences Centre, Toronto, ON, Canada
| | - Ruby Endre
- Sunnybrook Research Institute, Toronto, ON, Canada.,Department of Medical Imaging, Sunnybrook Health Sciences Centre, Toronto, ON, Canada
| | - Laura Jimenez-Juan
- Sunnybrook Research Institute, Toronto, ON, Canada.,Department of Medical Imaging, University of Toronto, Toronto, ON, Canada.,Department of Medical Imaging, Sunnybrook Health Sciences Centre, Toronto, ON, Canada
| | - Blair Henry
- Division of Neurology, Sunnybrook Health Sciences Centre, Toronto, ON, Canada
| | - Brian J Murray
- Sunnybrook Research Institute, Toronto, ON, Canada.,Department of Medicine, University of Toronto, Toronto, ON, Canada.,Department of Medicine, Sunnybrook Health Sciences Centre, Toronto, ON, Canada.,Division of Neurology, Sunnybrook Health Sciences Centre, Toronto, ON, Canada
| | - Benjamin I Goldstein
- Sunnybrook Research Institute, Toronto, ON, Canada.,Centre for Youth Bipolar Disorder, Centre for Addiction and Mental Health, Toronto, ON, Canada.,Department of Pharmacology & Toxicology, University of Toronto, Toronto, ON, Canada.,Department of Psychiatry, University of Toronto, Toronto, ON, Canada
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