Description:
Headache caused by a non-vascular intracranial disorder other than those described above.
Diagnostic criteria:
A. Any headache fulfilling criterion C
B. A non-vascular intracranial disorder known to be able to cause headache, other than those described above, has been demonstrated
C. Evidence of causation demonstrated by at least two of the following:
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1. headache has developed in temporal relation to the onset of the non-vascular intracranial disorder
2. either or both of the following:
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a) headache has developed or significantly worsened in parallel with worsening of the non-vascular intracranial disorder
b) headache has significantly improved in parallel with improvement of the non-vascular intracranial disorder
3. headache has characteristics typical for the non-vascular intracranial disorder
4. other evidence exists of causation
D. Not better accounted for by another ICHD-3 diagnosis.