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13262 Anatomy

A 25-year-old woman complains of headache for 4 months duration. She is obese and has bilateral papilledema, and her vision is deteriorating. Her opening CSF pressure is elevated; other CSF findings are normal. CT and MRI scans are normal. These signs are due to the result of impairment of CSF egress. At which of the following loci is obstruction most likely?

AArachnoid villi
BCerebral aqueduct
CForamen of Luschka (lateral)
DForamen of Magendie (median)
Anatomy
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