1980 Volume 20 Issue 1 Pages 27-35
Fifty cases of basal meningioma, consisting of olfactory groove, tuberculum sellae, middle fossa and sphenoidal ridge meningiomas, were subjected to study on operative gradings and factors influencing surgical limits. Complete resection of basal meningiomas was restricted owing to firm tumorous adhesion to the major vessels at the base of the skull. From the analysis of angiographical findings, it was found that irregular narrowing of the trunks of cerebral arteries as well as dissociation or narrowing at the distal portion of cerebral arteries constitutes convincible figures indicating complete resection as impossible.
Existence of extradural invasion of the tumor composed another cause of surgical incompletion. Transbasal approach was availably employed for removing such extradural extension. This approach can be applied not only for total removal of the lesion in focal bony invasion but also for relieving visual problems and advancing exophthalmos in cases with wide-spread osseous invasion.
