Vallo Benjamin

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OBJECTIVE Despite Cushing's accurate description of the anatomic origin of tuberculum sellae meningiomas, many subsequent authors have included tumors originating from the neighboring sella region in this classification. This has led to difficulty in evaluating the surgical results and consensus for an optimal surgical technique. We think this confusion has(More)
In a recent article, our experience and knowledge of the clinical picture, microsurgical anatomy, and long-term surgical outcome of resecting tuberculum sellae meningiomas was described in detail. We now present our surgical technique in a pictorial and video format for the benefit of neurosurgeons in training, as well as for general critique. Attention is(More)
OBJECTIVE AND IMPORTANCE Intracerebral schwannomas not associated with cranial nerves account for less than 1% of surgically treated schwannomas of the central and peripheral nervous system. Subfrontal schwannomas are extremely rare, with only 15 cases reported to date. CLINICAL PRESENTATION A 33-year-old man presented with a 4-month history of(More)
Although occipitocervical fusion is frequently used for instability of the upper cervical spine and the occipitocervical articulation, most currently used techniques have one or more of the following disadvantages: the necessity for sublaminar wires, the use of occipital screws, a fixed angle of instrumentation, or the necessity for routine postoperative(More)
Somatosensory evoked potentials (SEP's) were monitored during 42 angiographic examinations and 33 therapeutic embolization procedures in 41 patients. The SEP amplitude decreased in 36 of the 42 angiographic techniques, but recovered to baseline within 2 to 4 minutes in all but one case. Angiographic opacification of the anterior spinal artery reduced SEP(More)
Computed tomography (CT) of the lumbar spine was performed with selectively positioned 5-mm-thick axial cross sections to examine each disk level from the top of the neural foramen to the pedicle of the next caudad vertebra. One hundred consecutive patients with 116 surgical disk explorations were reviewed. There was agreement between the CT and surgical(More)
Thickening of the ligamenta flava with and without ossification in the thoracic and lumbar regions is a frequent finding on CT scanning; however, it is not widely appreciated as a possible primary cause of compressive cord, cauda equina, and nerve-root symptoms. We present observations from a series of seven patients whose symptoms were caused exclusively(More)
The patient presenting with a spinal meningioma usually has a slow indolent course of symptoms but at the time of diagnosis will have a range of neurological deficits. The diagnosis is most commonly secured with MR imaging. Safe resection of spinal meningiomas mandates a clear understanding of their growth characteristics as well as of regional anatomy.(More)