PURPOSE: To investigate signal alterations in the thalamic lateral geniculate bodies of blind patients compatible with transsynaptic degeneration of these nuclei caused by pregeniculate or postgeniculate interruption of the visual pathway. METHODS: Six patients were selected from a group of blind children in our care. Four had cerebral palsy caused by periventricular leukomalacia, one had infantile neuroaxonal dystrophy, and one had Chiari I malformation and hydrocephalus, which was worsened by bilateral ischemic lesions of the occipital lobes. MR examinations (obtained at 0.5 T) were reviewed retrospectively by two neuroradiologists, with particular attention to the visual pathway. RESULTS: Symmetric, focal areas of T2 prolongation were found at the precise site of the lateral geniculate bodies. CONCLUSION: Anterograde (pregeniculate) and retrograde (postgeniculate) transsynaptic degeneration of the second neurons of the visual pathway produce alterations in MR signal.
PURPOSE: To investigate signal alterations in the thalamic lateral geniculate bodies of blind patients compatible with transsynaptic degeneration of these nuclei caused by pregeniculate or postgeniculate interruption of the visual pathway. METHODS: Six patients were selected from a group of blind children in our care. Four had cerebral palsy caused by periventricular leukomalacia, one had infantile neuroaxonal dystrophy, and one had Chiari I malformation and hydrocephalus, which was worsened by bilateral ischemic lesions of the occipital lobes. MR examinations (obtained at 0.5 T) were reviewed retrospectively by two neuroradiologists, with particular attention to the visual pathway. RESULTS: Symmetric, focal areas of T2 prolongation were found at the precise site of the lateral geniculate bodies. CONCLUSION: Anterograde (pregeniculate) and retrograde (postgeniculate) transsynaptic degeneration of the second neurons of the visual pathway produce alterations in MR signal.
Authors: R Manara; V Citton; P Maffei; J D Marshall; J K Naggert; G Milan; R Vettor; A Baglione; A Vitale; C Briani; F Di Salle; A Favaro Journal: AJNR Am J Neuroradiol Date: 2014-10-29 Impact factor: 3.825
Authors: Daniëlle G M Bosch; F Nienke Boonstra; Claudia Gonzaga-Jauregui; Mafei Xu; Joep de Ligt; Shalini Jhangiani; Wojciech Wiszniewski; Donna M Muzny; Helger G Yntema; Rolph Pfundt; Lisenka E L M Vissers; Liesbeth Spruijt; Ellen A W Blokland; Chun-An Chen; Richard A Lewis; Sophia Y Tsai; Richard A Gibbs; Ming-Jer Tsai; James R Lupski; Huda Y Zoghbi; Frans P M Cremers; Bert B A de Vries; Christian P Schaaf Journal: Am J Hum Genet Date: 2014-01-23 Impact factor: 11.025
Authors: Daniëlle G M Bosch; F Nienke Boonstra; Michèl A A P Willemsen; Frans P M Cremers; Bert B A de Vries Journal: BMC Ophthalmol Date: 2014-05-01 Impact factor: 2.209