Skull Base Surgery of the Posterior Fossa

223

petroclival synchondrosis, 80
posterolateral approach, 80
surgical route, 80
Extraventricular drain (EVD), 179
Extreme-lateral approach, 136

F
Facial nerve function, 47, 48
Facial nerve preservation, 159
Falcotentorial junction, 117, 124, 125
posterior interhemispheric transtentorial approach,
125–127
surgical planning, 124–125
Falcotentorial meningioma, 124
Far/extreme lateral approaches, 95
Far-lateral approach, 15, 136, 138
anesthetic technique and positioning, 65–67
craniovertebral junction, 65
extradural exposure, 68–71
foramen magnum/craniovertebral junction region, 65
incision and muscle dissection, 66–68
intradural exposure, 72, 73
principles, 65
trans-tumor corridor, 65
variants, 72, 73
vascular lesions, 65
Fluid-attenuated inversion recover (FLAIR), 166
Foramen magnum, 89
Foramen magnum meningiomas (FMMs), 83, 89
arachnoidal fibers, 138
bipolar devascularization, 138, 139
classification, 136, 137
clinical presentation, 135
description, 135
EEA, 137
extreme-lateral approach, 136
far-lateral approach, 136, 138
monitoring, 138
outcomes and complications, 140–142
pathologic entity, 135
preoperative assessment, 136
radiosurgery, 136
resection, 139
rostrocaudal extent, 138
self-retaining retractors, 138
surgical approach, 135, 136
surgical factors, 136–140
tuberculum sella meningiomas, 138
ultrasonic aspirators, 140
vertebral artery, 138
Foramen magnum region, 65
Fourth ventricle, 165–167, 172, 173

G
Gadolinium-enhanced contrast imaging, 82
Gadolinium-enhanced MRI, 90
Gadolinium enhancement, 79
Galenic system, 124

Galenic venous system, 125

Gamma Knife therapy, 190

Garcia-Ibanez technique, 152

Gasserian ganglion (GG), 151

Gelatinous matrix, 80

Glasgow Outcome Scale score, 214

Greater superficial petrosal nerve (GSPN), 41, 60, 96, 97,

150–152, 155, 157

Gross total resection (GTR), 185

H

Hearing loss, 98

Hearing preservation, 47, 145, 146, 149, 150, 157–159

Hearing status, PC meningiomas, 92

Hemorrhage, 49

Hemostasis, 149

Honeycomb appearance, 79

Horner’s syndrome, 180

Hydrocephalus, 179

Hypothermia, 205–206

I

Indocyanine green angiography (ICG), 205

Internal acoustic canal (IAC), 96

Internal auditory canal (IAC), 43, 46, 103, 145, 147,

149–152, 155–159, 161

Internal auditory meatus, 12, 13

Internal carotid arteries (ICA), 90, 97

International Study of Unruptured Intracranial

Aneurysms (ISUIA), 200

Intracanalicular tumors, 157

Intracanalicular VSs, 150

Intracranial meningiomas, 115

Intradural anatomy, 28

Intradural exposure, 72, 73

Intradural posterior fossa tumors, 75, 81–84

Intraoperative electrophysiological neuromonitoring, 93

Intraoperative lumbar drain, 96

Intraoperative monitoring, 56

Intraoperative MRI (iMRI), 186

J

Jugular foramen, 13, 89

Jugular foramen syndrome, 179

K

Karnofsky performance scale (KPS), 182

Kerrison rongeurs, 31

L

Labyrinthectomy, 44, 45, 55

Lamina cribrosa, 156

Lateral approach, 80

Lateral and far anterolateral lesions, 187, 188

Lateral medulla, 210

Index