A 68-year-old man with a large occipital lobe infarct is found to have complete cortical blindness on formal perimetry. He insists his vision is normal and walks into furniture, then invents explanations for his injuries. This constellation of findings is known as:
- A Balint syndrome
- B Anton syndrome ✓
- C Charles Bonnet syndrome
- D Riddoch phenomenon
Correct answer: B. Anton syndrome
Explanation
Anton syndrome is cortical blindness with denial of blindness and confabulation, classically following bilateral occipital infarction, often from posterior circulation stroke. Balint syndrome comprises simultanagnosia, optic ataxia and oculomotor apraxia from bilateral parieto-occipital lesions. Charles Bonnet syndrome features vivid visual hallucinations in the visually impaired who know they cannot see well, which directly contradicts the denial seen here.
Reference: Harrison's Principles of Internal Medicine, 21st ed.
High-yield for: NEET PGINI-CETNExTFMGEUSMLEPLABMRCP
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