Stereotactic transsylvian, transinsular approach for deep-seated lesions. Surg Neurol 1997 Aug;48(2):113-24
Date
08/01/1997Pubmed ID
9242235DOI
10.1016/s0090-3019(96)00463-6Scopus ID
2-s2.0-0030753754 (requires institutional sign-in at Scopus site) 32 CitationsAbstract
BACKGROUND: Lesions located deep within the frontal and parietal lobes adjacent to the internal capsule are often considered surgically inaccessible. We have used intraoperative stereotactic lesion localization in conjunction with microsurgical dissection of the lateral sylvian fissure to accurately and atraumatically approach such lesions through the insular cortex.
METHODS: When possible, the sylvian fissure is widely opened using standard microsurgical technique. However, exploration through a precisely placed exposure no more than 1.0 cm in length is still feasible. Repeated intraoperative lesion localization employing ultrasound, frame-based or frameless stereotaxis was used to guide dissection deep to the Insular cortex.
RESULTS: Using this approach we have resected five cavernous angiomas, three plexiform AVMs and 2 low-grade gliomas. There was a single case of transient dysphasia in seven dominant hemisphere explorations and a single case of transient somatosensory impairment. Otherwise, there were no new transient or permanent postoperative neurologic deficits. In two cases, hemiparesis present prior to surgery improved following resection of a cavernous angioma.
CONCLUSIONS: The transsylvian, transinsular approach can be employed to safely expose lesions deep within the cerebral hemisphere. Anatomic considerations, surgical technical refinements, and clinical results are the subject of this report.
Author List
Heffez DSAuthor
Dan S. Heffez MD Professor in the Neurosurgery department at Medical College of WisconsinMESH terms used to index this publication - Major topics in bold
AdolescentAdult
Astrocytoma
Brain Diseases
Brain Neoplasms
Cavernous Sinus
Cerebral Aqueduct
Female
Glioma
Humans
Intracranial Arteriovenous Malformations
Magnetic Resonance Imaging
Male
Middle Aged
Neurosurgery
Stereotaxic Techniques
Vascular Surgical Procedures