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Revista Científica de la Sociedad Española de Enfermería Neurológica (Englis... Presence of palinopsia as a sign of selective CNS tractopathy: A case report
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Vol. 60.
(July - December 2024)
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Vol. 60.
(July - December 2024)
Case report
Presence of palinopsia as a sign of selective CNS tractopathy: A case report
Presencia de palinopsia como signo de tractopatía selectiva del SNC: reporte de un caso
Elnaz Asadollahzadeha, Vahid Shahmaeib, Rezvan Hassanpourc, Zahra Ebadia, Mohammad Ali Sahraiana, Abdorreza Naser Moghadasia,
Corresponding author
abdorrezamoghadasi@gmail.com

Corresponding author.
a Multiple Sclerosis Research Center, Neuroscience Institute, Tehran University of Medical Sciences, Tehran, Iran
b Radiology Technology Department, School of Allied Medical Sciences, Shahid Beheshti University of Medical Sciences, Tehran, Iran
c Department of Clinical Pharmacy, School of Pharmacy, Tehran University of Medical Sciences, Tehran, Iran
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Table 1. Diffusion tensor imaging (DTI) metrics in the suspected lesion region on pons.
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Table 2. Diffusion tensor imaging (DTI) metrics in whole brain, right and left optic radiation.
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Abstract

Palinopsia, described as the persistence of visual images or their recurrence after the stimulus has disappeared, represents a rare but important neuro-ophthalmic complication. Until now, the pathophysiology and the main location of this visual mainteanance condition are not been clearly understood. This study presents a 30-year-old woman with palinopsia who had her selective optic radiation lesion assessed by diffusion tensor imaging (DTI). The finding of magnetic resonance imaging (MRI) did not reveal any damage in the selective optic pathway whereas DTI showed a decreased density of the optic radiation tract. Furthermore, the mean diffusivity (MD), axial diffusivity (AD), and radial diffusivity (RD) were increased in suspected regions of lesions ds, while fractional anisotropy (FA) was decreased. To the authors’ knowledge, this is the first report of a case of palinopsia representing the central nervous system (CNS) tractopathy. Therefore, we encourage further investigation of optic pathway pathology using DTI in complex neurological complications, including palinopsia.

Keywords:
Palinopsia
Diffusion tensor imaging (DTI)
Optic tract
Tractopathy
Visual streams
Resumen

La palinopsia, descrita como la persistencia de imágenes visuales o su reaparición después de que el estímulo haya desaparecido, representa una complicación neuro-oftalmológica rara pero importante. Hasta ahora, la fisiopatología y la principal ubicación de esta condición de mantenimiento visual no se han comprendido de manera clara. Este estudio presenta el caso de una mujer de 30 años con palinopsia, cuya lesión selectiva de radiación óptica fue evaluada mediante imágenes de tensor de difusión (DTI).

La resonancia magnética (MRI) no reveló ningún daño en la vía óptica selectiva, mientras que el DTI mostró una disminución en la densidad del tracto de la radiación óptica. Además, la difusividad media (MD), la difusividad axial (AD) y la difusividad radial (RD) aumentaron en regiones sospechosas de lesiones ds, mientras que la anisotropía fraccional (FA) disminuyó. Según el conocimiento de los autores, este es el primer informe de un caso de palinopsia que representa una tractopatía del sistema nervioso central (CNS); por lo tanto, fomentamos una investigación adicional de la patología de la vía óptica utilizando la DTI en complicaciones neurológicas complejas, incluyendo la palinopsia.

Palabras clave:
Palinopsia
Imágenes de tensor de difusión (DTI)
Tracto óptico
Tractopatía
Corrientes visuales

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