Intraoperative Navigated Angiosonography for Skull Base Tumor Surgery.

Abstract:

BACKGROUND:One of the main challenges during skull base tumor surgery is identifying the relationships between the lesion and the principal intracranial vessels. To this end, neuronavigation systems based on preoperative imaging lack accuracy because of brain shift and brain deformation. Intraoperative navigated B-mode ultrasonography is useful in defining the extent of brain tumor. Doppler imaging adds information regarding flow entity in neighboring vessels. Second-generation ultrasound contrast agents improve the signal-to-noise ratio of B-mode imaging and permit the study of the vessel's course, blood flow, and perfusion characteristics of focal lesions. We report our experience using intraoperative navigated contrast-enhanced ultrasound to perform a navigated angiosonography (N-ASG) for the visualization of vessels in a series of 18 skull base tumors. METHODS:We performed N-ASG in a series of 18 skull base tumors (10 meningiomas, 3 craniopharyngiomas, 2 giant pituitary adenomas, 1 posterior fossa epidermoid, 2 dermoid cysts). N-ASG was obtained after craniotomy before resecting each lesion and during tumor removal, after intravenous injection of ultrasound contrast agent. RESULTS:In all 18 cases, major vessels and their branches were simultaneously identified (both high and low flow) using N-ASG, which allowed to visualize the whole length of each vessels. N-ASG was also useful in highlighting the lesion, compared with standard B-mode imaging, and showing its perfusion patterns. CONCLUSIONS:N-ASG can be applied to skull base tumor surgery, providing helpful information about the relationship between principal intracranial vessels and tumors. This technique could be of assistance in approaching the tumor and avoiding vascular damages.

journal_name

World Neurosurg

journal_title

World neurosurgery

authors

Prada F,Del Bene M,Casali C,Saladino A,Legnani FG,Perin A,Moiraghi A,Richetta C,Rampini A,Mattei L,Vetrano IG,Fornaro R,Saini M,Martegani A,DiMeco F

doi

10.1016/j.wneu.2015.07.025

subject

Has Abstract

pub_date

2015-12-01 00:00:00

pages

1699-707

issue

6

eissn

1878-8750

issn

1878-8769

pii

S1878-8750(15)00891-8

journal_volume

84

pub_type

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