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Table 2 Diagnostic criteria for headache due to spontaneous intracranial hypotension [7]

From: An unusual postural headache: a case report

The diagnostic criteria consist of
A, Orthostatic headache;
B, The presence of at least one of the following:
i. low opening pressure (≤ 60 mm H(2) O),
ii. sustained improvement of symptoms after epidural blood patching,
iii. Demonstration of an active spinal cerebrospinal fluid leak,
iv. cranial magnetic resonance imaging changes of intracranial hypotension
(including brain sagging or pachymeningeal enhancement);
C, No recent history of dural puncture,
D, Not attributable to another disorder.