[Palinopsia caused by tentorial meningioma. Case report]

Area of Science:

• Neuroscience
• Ophthalmology
• Neurology

Background:

• Palinopsia is a visual disturbance characterized by the persistence or recurrence of an image after the stimulus has been removed.
• Understanding the neurobiological underpinnings of palinopsia is crucial for diagnosing and managing visual processing disorders.

Observation:

• A female patient presented with recurrent visual disturbances consistent with palinopsia.
• Neuroimaging, specifically computed tomography, identified a well-demarcated, high-density mass in the left tentorial region.
• Standard visual field testing did not reveal any corresponding visual field defects.

Findings:

• The left tentorial meningioma was identified as the likely cause of the patient's palinopsia.
• Despite the presence of a mass, the absence of a detectable visual field defect suggests a more complex visual processing issue.

Implications:

• This case highlights that palinopsia can occur without overt visual field defects, suggesting a disruption in higher-level visual processing.
• The findings propose that disordered temporal synthesis of visual information may underlie palinopsia in certain cases.
• Further research into the neural mechanisms of visual perception and temporal integration is warranted to better understand conditions like palinopsia.