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Acta Neurochirurgica

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01.04.2010 | Clinical Article

Relationships between brain tumor and optic tract or calcarine fissure are involved in visual field deficits after surgery for brain tumor

verfasst von: Nobusada Shinoura, Yuichi Suzuki, Ryoji Yamada, Yusuke Tabei, Kuniaki Saito, Kazuo Yagi

Erschienen in: Acta Neurochirurgica | Ausgabe 4/2010

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Abstract

Purpose

Diffusion tensor tractography provides useful information regarding the surgical strategy for brain tumors. The goal of the present study was to analyze relationships between visual field deficits and the locations of brain tumors compared with optic tracts as visualized by tractography, and compared with the calcarine fissure.

Methods

Subjects comprised 11 patients with brain tumor in the occipital lobe or atrium of the lateral ventricle who underwent surgery between October 2006 and February 2009. Tumors were categorized as Type A, with almost all the optic tract in the occipital lobe or atrium of the lateral ventricle running close to and stretched by the brain tumor; and Type B, with the optic tract running at least partially distant to the brain tumor and remaining unstretched.

Results

Those type A optic tracts that were laterally compressed by brain tumors (Cases 1–3) displayed hemianopsia after surgery. When the brain tumor was located rostro-medial to the calcarine fissure and optic tracts were compressed caudally by the tumor, lower quadrant hemianopsia remained after surgery (Cases 4, 5). In other cases, the visual field remained or improved to normal after surgery.

Conclusion

The relationship between optic tracts or the calcarine fissure, and brain tumors in the occipital lobe or atrium of the lateral ventricle is related to visual field deficits after surgery. In particular, those Type A optic tracts that are compressed laterally show hemianopsia of the visual field after surgery.

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Titel: Relationships between brain tumor and optic tract or calcarine fissure are involved in visual field deficits after surgery for brain tumor
verfasst von: Nobusada Shinoura
Yuichi Suzuki
Ryoji Yamada
Yusuke Tabei
Kuniaki Saito
Kazuo Yagi
Publikationsdatum: 01.04.2010
Verlag: Springer Vienna
Erschienen in: Acta Neurochirurgica / Ausgabe 4/2010
Print ISSN: 0001-6268
Elektronische ISSN: 0942-0940
DOI: https://doi.org/10.1007/s00701-009-0582-0

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