HIGHLIGHTS
SUMMARY
A lumbar puncture) and result in debilitating symptoms, most commonly orthostatic headaches. SIH was once assumed rare but is now recognized as an important treatable cause of secondary headaches. While the prevalence of SIH is largely unknown, one study identified an incidence of 5 in 100,000 in patients that presented to the emergency department at a major urban hospital, which is similar to the rate of better-known causes of secondary headache including subarachnoid hemorrhage. Both the use of non-validated assessments (e_g, subjective improvement of headache or general symptoms) and validated outcome . . .
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