Premium
White matter abnormalities in a patient with visual snow syndrome: New evidence from a diffusion tensor imaging study
Author(s) -
Latini Francesco,
Fahlström Markus,
Marklund Niklas,
Feresiadou Amalia
Publication year - 2021
Publication title -
european journal of neurology
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 1.881
H-Index - 124
eISSN - 1468-1331
pISSN - 1351-5101
DOI - 10.1111/ene.14903
Subject(s) - inferior longitudinal fasciculus , white matter , diffusion mri , superior longitudinal fasciculus , fasciculus , medial longitudinal fasciculus , arcuate fasciculus , medicine , anatomy , neuroscience , fractional anisotropy , magnetic resonance imaging , psychology , radiology , central nervous system , midbrain
Background Visual snow syndrome (VSS) is a neurological condition characterized by flickering dots throughout the entire visual field. Both the pathophysiology and possible location of VSS are still under debate. White matter abnormalities were investigated using diffusion tensor imaging (DTI) in a patient with VSS. Methods A 28‐year‐old patient with VSS and 10 healthy controls were investigated with DTI. Diffusion parametric maps were calculated and reconstructed using q‐space diffeomorphic reconstruction. White matter pathways of the dorsal, ventral, integrative visual streams and thalamic connectivity were tracked. Then, they were applied to each subject's parameter map, stretched to the same length, and sampled along the tracts for regional analyses of DTI parameters. Results Compared with healthy controls, our patient displayed higher axial diffusivity (AD) and radial diffusivity (RD) in the dorsal visual stream (cingulum, arcuate fasciculus, horizontal indirect anterior segment of the superior longitudinal fasciculus), in the ventral visual stream (fronto‐occipital fasciculus, inferior longitudinal fasciculus) and in the integrative visual stream (indirect posterior component of the superior longitudinal fasciculus, vertical occipital fasciculus). Higher AD and RD were also detected in acoustic and optic radiations, and in thalamic radiations distal to the thalamus. Conclusion This VSS patient displayed multiple, bilateral white matter changes in the temporo‐parieto‐occipital junction in white matter pathways related to vision. We encourage the study of white matter pathology using DTI in complex neurological syndromes including VSS.