Roberta La Piana1, Carla Uggetti1, Federico Roncarolo1, Adeline Vanderver1, Ivana Olivieri1, Davide Tonduti1, Guy Helman1, Umberto Balottin1, Elisa Fazzi1, Yanick J Crow1, John Livingston2, Simona Orcesi2. 1. From the Department of Neuroradiology (R.L.P.) and Laboratory of Neurogenetics of Motion (R.L.P.), Montreal Neurological Institute and Hospital, McGill University, Canada; Unit of Neuroradiology (C.U.), Department of Radiology, San Carlo Borromeo Hospital, Milan, Italy; Public Health Research Institute of the University of Montreal (F.R.), Canada; Department of Neurology (A.V., G.H.), Children's National Health System, Washington, DC; Child Neurology and Psychiatry Unit (I.O., U.B., S.O.), C. Mondino National Neurological Institute, Pavia; Unit of Child Neurology and Psychiatry (D.T., U.B.), Department of Brain and Behavioural Sciences, University of Pavia; Department of Child Neurology (D.T.), Fondazione IRCCS Istituto Neurologico "Carlo Besta," Milan; Department of Clinical and Experimental Sciences (E.F.), Civil Hospital and University of Brescia, Italy; Imagine Institute (Y.J.C.), Paris Descartes University, INSERM UMR 1163, Paris, France; Manchester Centre for Genomic Medicine (Y.J.C.), Manchester Academic Health Sciences Centre, University of Manchester; and the Department of Paediatric Neurology (J.L.), Leeds Teaching Hospitals NHS Trust, UK. 2. From the Department of Neuroradiology (R.L.P.) and Laboratory of Neurogenetics of Motion (R.L.P.), Montreal Neurological Institute and Hospital, McGill University, Canada; Unit of Neuroradiology (C.U.), Department of Radiology, San Carlo Borromeo Hospital, Milan, Italy; Public Health Research Institute of the University of Montreal (F.R.), Canada; Department of Neurology (A.V., G.H.), Children's National Health System, Washington, DC; Child Neurology and Psychiatry Unit (I.O., U.B., S.O.), C. Mondino National Neurological Institute, Pavia; Unit of Child Neurology and Psychiatry (D.T., U.B.), Department of Brain and Behavioural Sciences, University of Pavia; Department of Child Neurology (D.T.), Fondazione IRCCS Istituto Neurologico "Carlo Besta," Milan; Department of Clinical and Experimental Sciences (E.F.), Civil Hospital and University of Brescia, Italy; Imagine Institute (Y.J.C.), Paris Descartes University, INSERM UMR 1163, Paris, France; Manchester Centre for Genomic Medicine (Y.J.C.), Manchester Academic Health Sciences Centre, University of Manchester; and the Department of Paediatric Neurology (J.L.), Leeds Teaching Hospitals NHS Trust, UK. simona.orcesi@mondino.it jh.livingston@nhs.net.
Abstract
OBJECTIVE: To perform an updated characterization of the neuroradiologic features of Aicardi-Goutières syndrome (AGS). METHODS: The neuroradiologic data of 121 subjects with AGS were collected. The CT and MRI data were analyzed with a systematic approach. Moreover, we evaluated if an association exists between the neuroradiologic findings, clinical features, and genotype. RESULTS: Brain calcifications were present in 110 subjects (90.9%). Severe calcification was associated with TREX1 mutations and early age at onset. Cerebral atrophy was documented in 111 subjects (91.8%). Leukoencephalopathy was present in 120 children (99.2%), with 3 main patterns: frontotemporal, diffuse, and periventricular. White matter rarefaction was found in 54 subjects (50.0%), strongly associated with mutations in TREX1 and an early age at onset. Other novel radiologic features were identified: deep white matter cysts, associated with TREX1 mutations, and delayed myelination, associated with RNASEH2B mutations and early age at onset. CONCLUSIONS: We demonstrate that the AGS neuroradiologic phenotype is expanding by adding new patterns and findings to the classic criteria. The heterogeneity of neuroradiologic patterns is partly explained by the timing of the disease onset and reflects the complexity of the pathogenic mechanisms.
OBJECTIVE: To perform an updated characterization of the neuroradiologic features of Aicardi-Goutières syndrome (AGS). METHODS: The neuroradiologic data of 121 subjects with AGS were collected. The CT and MRI data were analyzed with a systematic approach. Moreover, we evaluated if an association exists between the neuroradiologic findings, clinical features, and genotype. RESULTS: Brain calcifications were present in 110 subjects (90.9%). Severe calcification was associated with TREX1 mutations and early age at onset. Cerebral atrophy was documented in 111 subjects (91.8%). Leukoencephalopathy was present in 120 children (99.2%), with 3 main patterns: frontotemporal, diffuse, and periventricular. White matter rarefaction was found in 54 subjects (50.0%), strongly associated with mutations in TREX1 and an early age at onset. Other novel radiologic features were identified: deep white matter cysts, associated with TREX1 mutations, and delayed myelination, associated with RNASEH2B mutations and early age at onset. CONCLUSIONS: We demonstrate that the AGS neuroradiologic phenotype is expanding by adding new patterns and findings to the classic criteria. The heterogeneity of neuroradiologic patterns is partly explained by the timing of the disease onset and reflects the complexity of the pathogenic mechanisms.
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