Erin M. Simon

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BACKGROUND AND PURPOSE The clinical outcome of acute necrotizing encephalopathy of childhood (ANEC), an encephalopathy characterized by symmetrical involvement of the thalami, has historically been poor, but recent studies have reported better outcomes. By devising a MR imaging scoring system, we determined the relationship between characteristic MR(More)
BACKGROUND Despite advances in neuroimaging and molecular genetics of holoprosencephaly (HPE), the clinical spectrum of HPE has remained inadequately described. OBJECTIVE To better characterize the clinical features of HPE and identify specific neuroanatomic abnormalities that may be useful predictors of neurodevelopmental function. METHODS The authors(More)
BACKGROUND The middle interhemispheric variant (MIH) is a subtype of holoprosencephaly (HPE) in which the posterior frontal and parietal areas lack midline separation, whereas more polar areas of the cerebrum are fully cleaved. While the neuroradiologic features of this subtype have been recently detailed, the clinical features are largely unknown. (More)
X-linked Charcot-Marie-Tooth disease (CMTX) is the second most common form of inherited demyelinating neuropathy, next to CMT type 1A, which is caused by duplication of the PMP22 gene.1 CMTX is caused by mutations in GJB1, the gene encoding connexin32 (Cx32), which belongs to a highly conserved family of proteins that form gap junctions in vertebrates.(More)
BACKGROUND AND PURPOSE Although sonography is the primary imaging technique for evaluating the developing fetus, significant limitations exist in the sonographic prenatal diagnosis of many brain disorders. Fast MR imaging is increasingly being used to determine the underlying cause of nonspecific fetal CNS abnormalities detected sonographically and to(More)
Magnetic resonance imaging of the fetal spine is a vital complement to fetal sonographic examination. Assessing the wide spectrum of spinal dysraphism, as well as spinal neoplasia, allows for more correct prenatal diagnoses, patient care planning, and patient counselling. Proper appraisal of the value of experimental procedures, such as fetal(More)
OBJECTIVE To analyze imaging studies of 25 cases of agenesis of the corpus callosum with interhemispheric cyst to assess this malformation itself and associated anomalies. METHODS CT (6 patients) and MRI (19 patients) were retrospectively reviewed. The patients were categorized according to morphologic and clinical characteristics. RESULTS Based on(More)
BACKGROUND AND PURPOSE Although holoprosencephaly has been known for many years, few detailed analyses have been performed in a large series of patients to outline the range of morphology in this disorder, particularly regarding the deep gray nuclear structures. We reviewed a large patient cohort to elucidate the combinations of morphologic aberrations of(More)
We report a case of the middle interhemispheric variant of holoprosencephaly (MIH) with noncleavage of the posterior portion of the frontal lobes and the parietal regions in a fetus at 22 weeks' gestation. To our knowledge, this is the first case of the rare MIH variant to be diagnosed in utero by use of ultrafast MR imaging and one of the few such reports(More)
Bacterial meningitis is frequently fatal or leads to severe neurological impairment. Complications such as vasculitis, resulting in infarcts, should be anticipated and dealt with promptly. Our aim was to demonstrate the complications of meningitis by diffusion weighted imaging (DWI) in patients who deteriorated despite therapy. We studied 13 infants between(More)