Incidence of ischemic complications and technical nuances of arteries protection for insular gliomas resection.

Abstract

Insular gliomas remain surgically challenge due to their complex anatomical position and microvascular supply. The incidence of ischemic complications is a risk that should not be ignored. The goal of this study was to analyze the incidence of ischemia and its risk factors, and also describe a single surgeon's arteries protection experience of insular gliomas resection. The authors studied 75 consecutive cases of insular gliomas that underwent transcortical tumor resection in their division. Analysis included pre- and postoperative demographic, clinical, radiological including diffusion weighted imaging (DWI), as well as intraoperative neurophysiology data, and functional outcomes. Strategies such as “Residual Triangle”, “Basal Ganglia Reconstruction” and “Sculpting Technique” were used to protect lateral lenticulostriate arteries and main branches of M2 for maximal tumor resection according to the different classification of Berger-Sinai. Postoperative diffusion-weighted imaging showed acute ischemia in 44 patients, only 9 of whom developed new motor deficits. Flat inner edge (OR 0.144 95% CI 0.024, 0.876), and motor evoked potentials (MEPs) (<50%) (OR 18.182, 95% CI 3.311, 100.00) were determined to have significant associations with postoperative Critical Ischemia, which located in the posterior limb of the internal capsule or corona radiata. For insular gliomas resection, the protection of main branches of MCA is important. Insular gliomas resection might be with high incidence of ischemia uncovered by DWI which not always result in neurological deficits. Their own strategies maybe the feasible technical nuances allow the surgeon to achieve a thorough and safe resection. Motor evoked potentials is essential for its resection.