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Transport of intrathecal ¹³¹I RISA in benign intracranial hypertension

From the Division of Neurology, College of Medicine, University of Florida, Gainesville

SUMMARYThree patients with benign intracranial hypertension were studied with the techniques of RISA isotope cisternography and absorption. Two of 3 patients had a decreased plasma absorption of intrathecally injected ¹³¹I RISA at twenty-four hours. These findings suggest that in some cases of benign intracranial hypertension the increased intracranial pressure reflects an abnormality of CSF absorption through the arachnoid villi.

Dr. Bercaw's address is Neurology Section, The J. Hillis Miller Health Center, University of Florida, Gainesville, Florida 32601.

Submitted for publication Nov. 25, 1969; accepted Dec. 15, 1969.