The great longitudinal fissure (or longitudinal cerebral fissure, or longitudinal fissure, or interhemispheric fissure) is the deep groove that separates the two hemispheres of the brain.
The falx cerebri, lies within the medial longitudinal fissure.
The corpus callosum crosses the medial longitudinal fissure.
For treating a patient with multiple falcine and parasagittal lesions, we believe that it is beneficial to resect the maximum possible number of lesions during one operation, even if some lesions are asymptomatic. This practice can potentially reduce the total number of operations during a patient's lifetime.
We provide an introduction of a concurrent endoscopic approach via the interhemispheric fissure.
Applying this endoscopic approach concurrently with conventional microscopic surgery can enable the safe resection of as many lesions as possible during one operation 1).