Intraoperative neurosonography has become a useful adjunct in many neurosurgical procedures. Sonographic findings of twenty six intracranial lesions were reviewed and compared with CT or MRI findings. They were meningiomas (4) arteriovenous
malformations (4), neurocysticercosis (4), low-grade astrocytomas (2), oligodendrogliomas (2), lymphomas (2), hemangioblastomas (2) and others (6). Accuracy, sensitivity and specificity of the surrounding hrain edema on the sonography were 73%
(19/26),
71% (12/17) and 73% (7.9) respectively. It was usually more hyperechoic than that of normal white matter (9.12). The authors conclude that characterization of brain edema by sonography is useful in mapping the true extent of brain lesions.
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