• Samuel B Tomlinson, Benjamin K Hendricks, Fabio Torregrossa, Giovanni Grasso, and Aaron A Cohen-Gadol.
• The Neurosurgical Atlas, Indianapolis, Indiana, USA; School of Medicine and Dentistry, University of Rochester Medical Center, Rochester, New York, USA.
• World Neurosurg. 2019 Nov 1; 131: 321-327.

AbstractDeep-seated cerebral lesions have fascinated and frustrated countless surgical innovators since the dawn of the microneurosurgical era. To determine the optimal approach, the microneurosurgeon must take into account the characteristics and location of the pathological lesion as well as the operator's range of technical expertise. Increasingly, microneurosurgeons must select between multiple operative corridors that can provide access to the surgical target. Innovative trajectories have emerged for many indications that provide more flexible operative angles and superior exposure but result in longer working distances and more technically demanding maneuvers. In this article, we highlight 4 innovative surgical corridors and compare their strengths and weaknesses against those of more conventional approaches. Our goal is to use these examples to illustrate the following principles of microneurosurgical innovation: (1) discover more efficient and flexible exposures with superior working angles; (2) ensure maximal early protection of critical neurovascular structures; and (3) effectively handle target pathology with minimal disruption of normal tissues.Copyright © 2019 Elsevier Inc. All rights reserved.

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