Context: The management of parasagittal and falcine meningiomas centers around the relationship
between the tumor and the venous anatomy of the superior sagittal sinus (SSS) and
the bridging veins. Aims: The present study aims to address neurosurgical outcomes in a cohort of patients
with parasagittal and falcine meningiomas >2.0 cm in the largest diameter, in which
a neurosurgical/multidisciplinary treatment was considered. Settings and Design: The clinical outcomes of patients undergoing neurosurgical management for parasagittal
and falcine meningiomas at the authors' institution over a 15-year period were analyzed.
Analysis was limited to those tumors (primary, residual, or recurrences) >2.0 cm in
the largest diameter. Subjects and Methods: The authors identified 100 patients with parasagittal/falcine meningiomas >2.0 cm
in their largest diameter, who underwent neurosurgical treatment at their institution
between 1999 and 2013. Statistical Analysis Used: Tumor control was assessed using Kaplan–Meier analysis, and specific attention was
paid to the relationship between the tumor and the SSS and its impact on tumor control
and outcome. Results: There was no difference in rates of tumor control in patients who received subtotal
resection for a WHO Grade I tumor, followed by close observation, compared with those
undergoing gross-total resection, primarily because no cases were observed in which
the tumor remnant in the SSS demonstrated interval growth on serial imaging studies.
Of patients in this series, 13% experienced at least one neurological, medical, surgical,
or radiosurgical complication, and the mortality was 0%. Conclusions: These data provide a more judicious optimization of the expected outcome that can
be obtained with treatment of these tumors, in which a combination of image guidance,
advanced microsurgical techniques, and conformal radiation treatments is used.
Key-words:
Falcine meningiomas - microsurgical resection - parasagittal meningiomas - radiosurgery