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Background information of this research The aim of this research was to develop and internally validate a risk nomogram for schwannoma surgery postoperative complications. We investigated 83 patients who underwent schwannoma resection with a total number of 85 schwannomas from 2016 to 2020. To find the independent predictors of postoperative complications, we used univariate and multivariate logistic regression analysis during model development. Using bootstrapping validation, internal validation was assessed. Predictors included age, tumor location, signs, and surgical approach in the prediction nomogram. The nomogram was clinically useful when intervention was made at the complication possibility threshold of 2%, according to a Decision curve review by the CDC. Conclusions This updated risk nomogram for postoperative complications of schwannoma surgery has factored in age, tumor location, signs, and surgical approach. It would help patients understand the risk of postoperative complications leading up to surgery, as well as providing surgeons with tips for deciding on the surgical strategy.
Source link: https://doi.org/10.1055/s-0041-1739500
Abstract Abstract: The practical validity and postoperative results of FN in cerebellopontine surgery can be greatly enhanced by immediate facial nerve stimulation, as well as the transcranial facial motor neuro. The medical records of 58 patients with large VS who underwent microsurgical resection were retrospectively reviewed. The threshold was imposed on fMEP's baseline to incite the baseline amplitude of fMEP, and its transition from the baseline to the end of surgery was described as the delta fMEP. The patients presenting HBG 3 or more as a FN dysfunction group were classified as a FN dysfunction group at 1 week, 1 month, 6 months, and 1 year after surgical resection. At a long-term follow-up to the short-term follow-up, the delta fMEP value for FN dysfunction had a higher predictive value at a longer-term follow-up than at the short-term follow-up. These findings showed that the delta fMEP may be a useful indicator of FN dysfunction after surgical resection of large VS, especially for long-term results.
Source link: https://doi.org/10.21203/rs.3.rs-1931875/v1
Both types of Hybrid peripheral nerve sheath tumors have combined characteristics of more than one form of conventional benign peripheral nerve sheath tumors. In the head and neck region, there have been few cases of hybrid peripheral nerve sheath tumors. In the neurofibroma zone, CD34 was positive, and entrapped axons were positive for neurofilament. Although uncommon, Hybrid peripheral nerve sheath tumors, which are extremely rare, can also develop within the oral cavity. Recognizing hybrid peripheral nerve sheath tumors as a distinct clinicopathologic entity is crucial because they can also be associated with syndromic disorders.
Source link: https://doi.org/10.1177/10668969221117978
paraphrasedoutput:BACKGROUND Lesions of the internal auditory canal presenting with partial hearing loss are almost always vestibular schwannomas. OBSERVATIONS The authors discuss the case of a flow-related intracanalicular aneurysm from a partial left-sided hearing loss and an intracanalicular lesion masquerading as VS. A small pial AVM was discovered in the trigeminal root entry zone with a related flow-related intracanalicular AICA aneurysm, according to Cerebral angiography.
Source link: https://doi.org/10.3171/case22208
A soft tissue mass in the left side of the frontal bone revealed significant bone fracture with a soft tissue mass in the left side of the frontal bone, with no calcification inside or a sclerotic border around it. Computed tomography combined with three-dimensional reconstruction revealed extensive bone damage with a soft tissue mass in the left side of the frontal bone, without calcification inside or a sclerotic margin around it. LESSONS The authors explore unusual occurrence of a microcystic/reticular schwannoma arising in the frontal bone, with relatively thorough imaging data that allowed them to learn more about the condition.
Source link: https://doi.org/10.3171/case21175
paraphrasedoutput:BACKGROUND Late pathology following vestibular schwannoma radiosurgery is unusual, with late pathology in this case. When no residual tumor was found, the authors outlined a case of a resected hemorrhagic mass 13 years after radiosurgery. ObSERVATIONS A 56-year-old man with multiple comorbidities, including myelodysplastic syndrome cirrhosis, underwent Gamma Knife surgery for a left vestibular schwannoma. In selected patients, radiosurgery for vestibular schwannoma has been a rare risk of intralesional hemorrhage.
Source link: https://doi.org/10.3171/case21614
paraphrasedoutput:BACKGROUND Acute intratumoral hemorrhage inside a vestibular schwannoma, or vestibular apoplexy, is a rare occurrence. Patients with vestibular schwannoma growth have an acute and chronic onset of apoplexy in addition to severe vertigo and hearing loss in comparison to traditional vestibular schwannoma development. Imaging revealed a 2. 8-cm hemorrhagic left cerebellopontine angle lesion extending into the left internal auditory canal, consistent with hemorrhagic vestibular schwannoma. LESSONS Vestibular schwannomas are typically associated with decreased hearing and persistent vestibulopathy.
Source link: https://doi.org/10.3171/case21722
BACKGROUND Giant presacral schwannomas are extremely unusual in neurosurgery. There are several methods for the surgical treatment of symptomatic giant presacral schwannomas. Lessons The authors have suggested that complete tumor resection with a minimally invasive dorsal approach without the occurrence of intra- and postoperative complications. Operative corridors that have been caused by a tumor can be used and expanded for a minimally invasive dorsal strategy to aid resection and minimize tissue disruption.
Source link: https://doi.org/10.3171/case21319
In the perilabyrinthine cells, the majority of bone defects in the internal auditory canal posterior wall are present. Bone defects in the IAC posterior wall, which ran further posteroinferiorly in the petrous bone, were evidently in the medial part of the jugular bulb, according to preoperative bone window computed tomographic scans. Except for the vein running from the brain stem to the IAC posterior wall, there was no other significant vein in the cerebellomedullary cistern. The authors did not drill out the IAC posterior wall or remove the tumor in the IAC to prevent complications due to venous congestion, but did not drill out the IAC posterior wall or remove the tumor in the IAC to avoid complications caused by venous congestion.
Source link: https://doi.org/10.3171/case21487
The authors' article The authors demonstrate a fruitful minimally invasive retroperitoneal transpoas strategy for resection of an L4 nerve root schwannoma. The tumor was debulked, and the tumor capsule was detached from the surrounding tissue. A functional nerve root was carefully dissected from the tumor capsule during dissection and stimulation was administered by direct stimulation.
Source link: https://doi.org/10.3171/2022.3.focvid2220
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