良性脳腫瘍,とくに髓膜腫の外来診断の要点

抄録

Benign brain tumors, especially meningioma, do not produce any objective clinical finding. Most patients show no abnormality even on pneumoencephalography or angiography. Consequently, meningioma has been difficult to diagnose. CT-scanning, however, is capable of detecting meningioma, which cannot be diagnosed by routine outpatient examinations. It is no exaggeration to say that CT-scanners made the diagnosis of meningioma possible.
Recently we have examined eight cases of meningioma using the CT-scanner and correlated chief complaints and findings from routine outpatient examinations which are attributed to meningioma. We have established the following criteria on the diagnosis of meningioma:
1) The most outstanding complaints are transitory, repetitive or spontaneous oscillopsia and vertigo of short duration.
2) While a vertiginous attack is slight and short in duration, nausea and headaches are severe and long-lasting. The discrepancy between the two should be noted.
3) The symptoms may be remitted or repetitive. There is no symptom during the intermittent period.
4) Vertical or rotatory nystagmus appears on the record of ENG with the eyes closed.
5) There are some symptoms indicating disorders of the central nervous system.
6) There is a falling tendency on the sagittal plane.