Fig. 41.1 Management protocol for posterior circulation aneurysms (Note that age is given in years) 41.3 Collateral Circulation and Parent Vessel Sacrifice The effect of occlusion of the posterior circulation…
Large/or giant saccular aneurysms ≥ 14 mm Calcified or atherosclerotic sac, heavily thrombosed Complex or absent neck Neck diameter >4 mm Neck encompasses > 90° of vessel circumference Dome/neck ratio < 1.5 Atherosclerosis, calcification Fusiform aneurysms…
Fig. 39.1 Video electroencephalogram (EEG): ictal EEG showing rhythmical theta activity in electrodes in the right mesial temporal lobe Over recent years, improvements in imaging techniques such as magnetic resonance…
Fig. 10.1 Effect of collagen shrinking by heat The evidence of the effectiveness and safety of this method in low back pain has been described in various reports. Saal and…
Fig. 44.1 (a, b) Anatomical facet replacement (ACADIA™) 44.2 Indication and Surgical Technique Indications for facet replacement are painful degenerated vertebral joints. Spinal stenosis, namely, lateral recess and foraminal stenosis…
Fig. 20.1 Preoperative thin-slice temporal bone CT. (a) Note the close relationship of the cochlea (black arrow), vestibule (white arrowhead), and internal auditory canal (asterisk). The emissary vein (black arrowhead)…
Histology No. of cases Total Subtotal Paragangliomas 74 58a 16b Schwannomas 19 19 00 Meningiomas 13 07 06 Aneur. bone cyst 02 02 00 Chondrosarcoma 07 01 06 Chordoma 07…
Fig. 21.1 Large extracranial trigeminal schwannoma with small middle fossa extension (type A) Fig. 21.2 Drawing of trigeminal schwannoma with main portion in the middle fossa and small extracranial extension…
Fig. 19.1 (a, b) Cerebellopontine angle meningioma. (c) Low clivus meningioma. (d–f) Petroclival meningioma 19.3 History Classically, posterior fossa meningiomas were classified in 1953 by Castellano and Ruggiero [5] using…
Fig. 22.1 Most common origin sites of facial nerve schwannomas. ICA internal carotid artery, TN trigeminal nerve, TU tumor 22.2 Surgical Anatomy The surgical anatomy of the petrous apex, temporal…
