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Journal of Child Neurology
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Quantitative Morphology of the Corpus Callosum in Children With Neurofibromatosis and Attention-Deficit Hyperactivity Disorder

Anne E. Kayl, PhD

University of Texas M.D. Anderson Cancer Center

Bartlett D. Moore, PhD

University of Texas M.D. Anderson Cancer Center, bmoore @mdanderson.org

John M. Slopis, MD

University of Texas Medical School at Houston Houston, TX

Edward F. Jackson, PhD

University of Texas M.D. Anderson Cancer Center

Norman E. Leeds, MD

University of Texas M.D. Anderson Cancer Center

Neurofibromatosis-1 is a common autosomal-dominant genetic disorder associated with numerous physical anomalies and an increased incidence of attention-deficit hyperactivity disorder (ADHD). Studies of children with idiopathic ADHD have suggested a link between corpus callosum size and symptom severity. This study examines the contribution of corpus callosum morphology to symptoms of ADHD in children with neurofibromatosis. Eighteen control subjects and 36 children with neurofibromatosis underwent magnetic resonance imaging of the brain. Twelve subjects with neurofibromatosis had evidence of ADHD and 24 did not. Subjects with neurofibromatosis had significantly larger total corpus callosum area and significantly larger regional measurements in three of seven areas. However, there were no differences between the neurofibromatosis alone and neurofibromatosis plus ADHD groups. Increased severity of attention problems was associated with smaller total callosal areas. These results suggest that some features of ADHD in children with neurofibromatosis could be linked to quantifiable differences in brain morphology, but the nature of the genetic mutation in neurofibromatosis suggests that neurochemical effects also could be important. (J Child Neurol 2000;15:90-96).

Journal of Child Neurology, Vol. 15, No. 2, 90-96 (2000)
DOI: 10.1177/088307380001500206
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