NDLI: Parafalcine and midline arteriovenous malformations: surgical strategy, techniques, and outcomes.

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Parafalcine and midline arteriovenous malformations: surgical strategy, techniques, and outcomes.

Subdural hematoma.

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Parafalcine and midline arteriovenous malformations: surgical strategy, techniques, and outcomes.

Content Provider	World Health Organization (WHO)-Global Index Medicus
Author	Kim, Yong Bae Young, William L. Lawton, Michael T.
Description	Country affiliation: United States Author Affiliation: Kim YB ( Department of Neurological Surgery, University of California, San Francisco, California, USA.)
Abstract	OBJECT: Parafalcine arteriovenous malformations (AVMs) have a midline plane in common, but differ in their location (anterior, middle, or posterior) and depth (superficial or deep). Surgical management varies with AVM location and depth in terms of patient position, head position, craniotomy, and surgical approach. This study examined surgical strategies, patient outcomes, and regional factors influencing results. METHODS: Patients with AVMs located on the medial surface of the cerebral hemisphere were identified retrospectively from a consecutive, single-neurosurgeon series that is registered prospectively as part of the UCSF Brain Arteriovenous Malformation Study Project. During a 12-year period, 443 patients with AVMs were treated surgically. Of these 443 patients, 132 (30%) had parafalcine AVMs, which were distributed in zones as follows: superficial-anterior, 25 (18.9%); superficial-middle, 26 (19.7%); superficial-posterior, 39 (29.5%); deep-anterior, 25 (18.9%); deep-posterior, 17 (12.9%). Five different surgical strategies were used depending on AVM zone. RESULTS: Complete AVM resection was achieved in 123 (93.2%) of 132 patients. Overall, neurological condition improved in 74 patients (56.1%) and remained unchanged in 41 patients (31.1%). Neurological condition deteriorated in 12 patients (9.1%), and 5 patients (3.8%) died. Patients with AVMs in the superficial-middle zone had the highest rate of neurological deterioration (26.9%). CONCLUSIONS: Parafalcine AVMs lie on a midline surface that, when exposed with a bilateral craniotomy across the superior sagittal sinus and a wide opening of the interhemispheric fissure, makes them superficial. However, unlike convexity AVMs, which are approached perpendicularly, parafalcine AVMs are approached tangentially. Gravity retraction is useful with deeply located AVMs (those in the deep-anterior and deep-posterior zones), because it widens the interhemispheric fissure and accesses deep arterial feeding vessels from the anterior and posterior cerebral arteries. Surgical risks were increased in the superficial-middle zone, which is likely explained by the proximity of sensorimotor cortex. The authors' regional classification of parafalcine AVMs may serve as a guide to surgical planning.
File Format	HTM / HTML
ISSN	00223085
e-ISSN	19330693
Journal	Journal of Neurosurgery
Issue Number	4
Volume Number	114
Language	English
Publisher	American Association of Neurological Surgeons
Publisher Date	2011-04-01
Publisher Place	United States
Access Restriction	Open
Subject Keyword	Discipline Neurosurgery Intracranial Arteriovenous Malformations Surgery Neurosurgical Procedures Vascular Surgical Procedures Adolescent Child, Preschool Craniotomy Embolization, Therapeutic Infant Complications Pathology Radiosurgery
Content Type	Text
Resource Type	Article
Subject	Neurology (clinical) Surgery

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