| Image-guided surgical planning using anatomical landmarks in the retrosigmoid approach. | |
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MedLine Citation:
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PMID: 19902141 Owner: NLM Status: MEDLINE |
Abstract/OtherAbstract:
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OBJECTIVE: The suboccipital lateral or retrosigmoid approach is the main neurosurgical approach to the cerebellopontine angle (CPA). It is mainly used in the treatment of CPA tumors and vascular decompression of cranial nerves. A prospective study using navigation registered with anatomical landmarks in order to identify the transverse and sigmoid sinuses junction (TSSJ) was carried out in a series of 30 retrosigmoid craniotomies. The goal of this study was to determine the accuracy of this navigation technique and to establish the relationship between the location of the asterion and the TSSJ. METHODS: From March through November 2008, 30 patients underwent a retrosigmoid craniotomy for removal of CPA tumors or for surgical treatment of neurovascular syndromes. Magnetic resonance imaging (MRI) T1 sequences with gadolinium (FSPGR with FatSst, 1.5 T GE Signa) and frameless navigation (Vector vision, Brainlab) were used for surgical planning. Registration was performed using six anatomical landmarks. The position of the TSSJ indicated by navigation was the landmark to guide the craniotomy. The location of the asterion was compared with the position of the TSSJ. After craniotomy, the real TSSJ position was compared with the virtual position, as demonstrated by navigation. RESULTS: There were 19 cases of vestibular schwannomas, 5 petroclival meningiomas, 3 trigeminal neuralgias, 1 angioblastoma, 1 epidermoid cyst and 1 hemifacial spasm. In all cases, navigation enabled the location of the TSSJ and the emissary vein, with an accuracy flaw below 2 mm. The asterion was located directly over the TSSJ in only seven cases. One patient had a laceration of the sigmoid sinus during the craniotomy. CONCLUSIONS: Navigation using anatomical landmarks for registration is a reliable method in the localization of the TSSJ for retrosigmoid craniotomies and thereby avoiding unnecessary sinus exposure. In addition, the method proved to be fast and accurate. The asterion was found to be a less accurate landmark for the localization of the TSSJ using navigation. |
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Authors:
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Erasmo Barros da Silva; André G Leal; Jerônimo B Milano; Luis F Moura da Silva; Rogério S Clemente; Ricardo Ramina |
Publication Detail:
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Type: Journal Article Date: 2009-11-10 |
Journal Detail:
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Title: Acta neurochirurgica Volume: 152 ISSN: 0942-0940 ISO Abbreviation: Acta Neurochir (Wien) Publication Date: 2010 May |
Date Detail:
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Created Date: 2010-04-19 Completed Date: 2010-07-19 Revised Date: - |
Medline Journal Info:
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Nlm Unique ID: 0151000 Medline TA: Acta Neurochir (Wien) Country: Austria |
Other Details:
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Languages: eng Pagination: 905-10 Citation Subset: IM |
Affiliation:
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Departament of Neurosurgery, Instituto de Neurologia de Curitiba, Rua Jeremias Maciel Perretto 300, Curitiba, Paraná, Brazil. teeth@uol.com.br |
Export Citation:
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| MeSH Terms | |
Descriptor/Qualifier:
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Adult Aged Brain Neoplasms / surgery Cerebellopontine Angle / anatomy & histology, surgery* Cerebrovascular Disorders / surgery Cranial Fossa, Posterior / anatomy & histology, blood supply, surgery Cranial Nerve Neoplasms / surgery Cranial Sinuses / anatomy & histology, surgery Craniotomy / instrumentation, methods* Female Humans Magnetic Resonance Imaging / methods Male Middle Aged Neuronavigation / instrumentation, methods* Occipital Bone / anatomy & histology, surgery* Preoperative Care / instrumentation, methods Prospective Studies Surgery, Computer-Assisted / instrumentation, methods* Young Adult |
From MEDLINE®/PubMed®, a database of the U.S. National Library of Medicine
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