[Homonymous hemianopsia in brain tumors]

Area of Science:

• Neuroscience
• Ophthalmology
• Neurology

Context:

• Homonymous hemianopsia, a visual field defect, can result from lesions in the visual pathway.
• Brain tumors are a significant cause of such lesions, particularly in the optic tract, lateral geniculate body, optic radiation, and visual cortex.

Purpose:

• To describe the types of homonymous hemianopia caused by tumors along the suprachiasmatic pathway.
• To review general neurological signs and symptoms associated with brain tumors.
• To discuss important diagnostic imaging methods and differential diagnoses for brain tumors.

Summary:

• Tumors account for a substantial proportion of temporal, parietal, and occipital lesions causing homonymous hemianopsia.
• Brain tumors typically present with initial focal neurological deficits followed by signs of increased intracranial pressure.
• Diagnostic tools like CT, MRI, and angiography are crucial for identifying these tumors.

Impact:

• Improved understanding of the relationship between brain tumor location and visual field defects.
• Enhanced diagnostic strategies for patients presenting with homonymous hemianopsia.
• Facilitates earlier detection and management of brain tumors affecting the visual system.