Headache caused by carcinomatous meningitis, usually accompanied by signs of encephalopathy and/or cranial nerve palsies.
- Any headache fulfilling criterion C
- Carcinomatous meningitis (in the presence of systemic neoplasia known to be associated with carcinomatous meningitis) has been demonstrated
- Evidence of causation demonstrated by at least two of the following:
- headache has developed in temporal relation to development of the carcinomatous meningitis
- either or both of the following:
- a) headache has significantly worsened in parallel with worsening of the carcinomatous meningitis
- b) headache has significantly improved in parallel with improvement in the carcinomatous meningitis
- headache is associated with cranial nerve palsies and/or encephalopathy
- Not better accounted for by another ICHD-3 diagnosis.