Risks of Corpus Callosum Infarction After Frontal Lobe Paramedian Tumor Resection
Overview
Resection of the cingulate gyrus during frontal lobe tumor surgery is associated with a high risk of ischemic injury to the adjacent corpus callosum. In 84.2% of cases with cingulate gyrus resection, ischemia was observed in the corpus callosum, whereas no ischemia occurred when the cingulate gyrus was preserved.
Background
The corpus callosum connects the cerebral hemispheres and receives blood supply primarily from the callosal artery branching from the pericallosal artery. Recent microangiographic studies have shown that arteries perforating the cingulate gyrus also contribute to the blood supply of the lateral corpus callosum. This suggests that surgical resection of the cingulate gyrus may risk ischemic injury to the corpus callosum. This study retrospectively analyzed imaging and clinical data to evaluate this risk in patients undergoing tumor resection in the frontal lobe paramedian areas.
Mean length of cingulate gyrus resection: 26.3 ± 1.2 mm Mean length of ischemic region in corpus callosum: 31 ± 3.6 mm Overlap of ischemic region with resected cingulate gyrus area: 81%
Key Findings
Ischemic lesions in the corpus callosum occurred in 84.2% of cases with cingulate gyrus resection.
When the corpus callosum was preserved during cingulate gyrus resection, ischemia was observed laterally in 100% of cases.
No corpus callosum ischemia was observed in cases without cingulate gyrus resection.
The extent of ischemia in the corpus callosum closely matched the length of the cingulate gyrus resection, with an 81% overlap.
Partial resection of the corpus callosum was associated with ischemia in 63% of cases.
Careful surgical technique is required to avoid injury to small vessels supplying the corpus callosum during cingulate gyrus resection.
Clinical Implications
Surgeons performing tumor resections involving the cingulate gyrus should be aware of the high risk of ischemic injury to the adjacent corpus callosum due to shared vascular supply. Preservation of the corpus callosum and meticulous handling of the small perforating vessels during subpial resection may reduce ischemic complications. Postoperative imaging should be used to monitor for ischemic lesions in this region.
Conclusion
Resection of the cingulate gyrus in frontal lobe tumor surgery carries a significant risk of ischemic infarction in the adjacent corpus callosum, likely due to disruption of shared vascular supply. Awareness and careful surgical technique are essential to minimize this risk.
References
Okudera et al. -- Microangiographic studies of corpus callosum blood supply
Akashi et al. -- Arterial supply to lateral corpus callosum
Tohoku University Hospital IRB 2023 -- Retrospective study on tumor resection and corpus callosum ischemia
