World Neurosurg
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Review Case Reports
Asystole during Onyx embolization of a Pediatric Arteriovenous Malformation: a severe case of the Trigeminocardiac reflex.
Trigeminal-cardiac reflex (TCR) from the stimulation of sensory branches of trigeminal nerve can lead to hemodynamic instability. This phenomenon has been described during ophthalmologic, craniofacial, and skull base surgeries. TCR has been reported rarely with endovascular onyx embolization of dural arteriovenous fistulas. ⋯ TCR can lead to significant hemodynamic changes during endovascular Onyx embolization of vascular malformations (both pial AVM and dural arteriovenous fistulas) involving receptive field of trigeminal nerve. Therefore, the anesthesiologist should be made aware of treatment approach before intervention and appropriate precautions taken.
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Multicenter Study
Increased peri-operative crystalloid transfusion is associated with better outcomes after spontaneous hypertensive putamen hemorrhage: A retrospective study.
The appropriate amount of transfused fluids, and which types of fluids should be transfused during the peri-operative period, is a matter of controversy among neurosurgeons. Thus, a retrospective study was conducted to assess whether crystalloid transfusion is associated with better outcomes after spontaneous hypertensive putamen hemorrhage (HPH). ⋯ Increased perioperative crystalloid transfusion was independently associated with better outcome across a spectrum of surgical risk profiles after spontaneous HPH.
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Review Case Reports
High-definition fiber tractography in evaluation and surgical planning of thalamopeduncular pilocytic astrocytomas in pediatric population: case series and review of literature.
Thalamopeduncular tumors (TPTs) of childhood present a challenge for neurosurgeons due to their eloquent location. Preoperative fiber tracking provides total or near-total resection, without additional neurologic deficit. High-definition fiber tractography (HDFT) is an advanced white matter imaging technique derived from magnetic resonance imaging diffusion data, shown to overcome the limitations of diffusion tensor imaging. We aimed to investigate alterations of corticospinal tract (CST) and medial lemniscus (ML) caused by TPTs and to demonstrate the application of HDFT in preoperative planning. ⋯ Displacement patterns of the perilesional fiber bundles by TPTs are not predictable. Fiber tracking, preferably HDFT, should be part of preoperative planning to achieve maximal extent of resection for longer survival rates in this young group of patients, while preserving white matter tracts and thus quality of life.
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Venous infarction in the brainstem caused by venous congestion is an extremely rare complication of traumatic carotid cavernous fistulas (CCFs). This condition requires immediate treatment and a multimodal treatment strategy is needed to prevent recurrence. ⋯ To ensure prevention of recurrent CCF, internal carotid artery trapping combined with high-flow bypass surgery can be a good salvage treatment for urgent cases in which an endovascular approach already failed.
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Review Case Reports
Glioblastoma Secondary to Meningioma: A Case Report and Literature Review.
The pathophysiologies underlying meningioma and glioma are distinct. The coexistence of those 2 lesions in the same patient is rare, and at the same location, it is even more exceptional. ⋯ Glial transformation meningiomas remain a contentious issue, with coincidental occurrence being the most prevalent explanation. Nevertheless, impairment of the same molecular signaling pathways in both tumor types suggests a common origin. Another hypothesis is that perilesional parenchymal damage from radiotherapy or surgery may lead to glial transformation in the tissues surrounding the original meningioma lesion. Further research is needed to determine if the original tumor or surgery has an oncogenic effect on the adjacent tissue.