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Parietal Optic Radiation – Inferior Quadrantanopia — SCE Neurology MCQ

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HardNeuro-ophthalmologyParietal Optic Radiation – Inferior QuadrantanopiaSCE Neurology

A 55-year-old woman with a right parietal glioma develops a left homonymous inferior quadrantanopia. What part of the visual pathway is affected?

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Correct answer: EParietal lobe optic radiation (superior fibres)

The best answer is “Parietal lobe optic radiation (superior fibres)”. Neuro-oncology management depends on anatomical compartment, histology, molecular classification, growth, neurological deficit and resectability, with specialist multidisciplinary planning. The alternatives “Meyer's loop in the temporal lobe”, “Optic chiasm, when the phenotype supports it”, “Optic nerve, within the relevant UK pathway”, “Calcarine cortex, after excluding important mimics” are clinically adjacent possibilities, but they do not match the defining chronology, localisation, physiology, investigation result or UK management sequence in this stem.

Reference: NICE NG99 brain tumours and metastases recommendations: https://www.nice.org.uk/guidance/ng99/chapter/Recommendations