Scientists at University of California Report Research in Headache and Migraine.

"The clinical and radiographic manifestations of spontaneous intracranial hypotension are highly variable and many patients do not satisfy the 2004 International Classification of Headache Disorders criteria," scientists writing in the journal Headache report (see also Headache and Migraine).

"We developed new diagnostic criteria for spontaneous intracranial hypotension based on cases we have seen reflecting the variable manifestations of the disorder. These criteria provide a basis for change when the classification criteria are next revised," wrote W.I. Schievink and colleagues, University of California.

The researchers concluded: "The diagnostic criteria consist …