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- W4247925815 abstract "OBJECTIVE To describe the technical steps, advantages, and limitations of a quicker, minimal-exposure, functional hemispherectomy procedure developed from a hemispherical deafferentation technique previously described. METHODS The surgical approach using the transsylvian/transsulcal passage to the ventricular system, with the anatomic orientation points and key features for planning of the small trepanation, is described. Through a linear incision, a craniotomy (4 × 4 to 4 × 5 cm) is placed over the sylvian fissure. Transsylvian exposure of the circular sulcus allows transcortical exposure of the entire ventricular system, from the frontal horn to the temporal horn encircling the insular cortex. The frontobasal and mesial white matter is disconnected via the intraventricular approach, with a callosotomy. An amygdalohippocampectomy completes the dissection. The experience with 20 patients who were treated using the transsylvian keyhole hemispherectomy technique is summarized. RESULTS The operation time was significantly shorter (mean, 3.6 h) than with the Rasmussen technique (mean, 6.3 h) and 25% shorter than with the transcortical perisylvian technique (mean, 4.9 h). The proportion of patients requiring blood replacements was lower (15 versus 58%), as was the mean amount of transfused blood. The mean follow-up period was 46 months; 88% of patients were in Engel Outcome Class I, 6% in Class III, and 6% in Class IV. CONCLUSION The transsylvian keyhole procedure has been demonstrated to further reduce operation time and the need for blood replacement. It is most easily performed in cases with enlarged ventricles or perinatal ischemic cysts and is not recommended for hemimegalencephaly. The immediate seizure relief was satisfying. This minimal-exposure approach seems to be a satisfying alternative among possible functional hemispherectomy procedures." @default.
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- W4247925815 date "2001-10-01" @default.
- W4247925815 modified "2023-10-08" @default.
- W4247925815 title "Transsylvian Keyhole Functional Hemispherectomy" @default.
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- W4247925815 doi "https://doi.org/10.1227/00006123-200110000-00021" @default.
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